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Statistics and facts about sleep

100 Sleep Statistics: Facts and Data for 2026

Author:

Neera team

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September 15, 2026

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Expert review by:

Elina Karseeva, PhD

About one in three American adults sleeps less than seven hours a night, and that number has barely moved in a decade. If you came here looking for a figure to quote, that's the one most worth knowing.

What follows is 100 sleep statistics pulled from federal health surveys, sleep medicine bodies and peer-reviewed research. Every one carries its source and the year the data was collected, because a lot of the numbers circulating online are a decade old and presented as current. Where researchers disagree, we say so rather than picking the tidier answer.

How much sleep do Americans actually get?

Just over 30% of US adults sleep less than seven hours a night, which is the minimum the American Academy of Sleep Medicine recommends. The figure comes from the 2024 National Health Interview Survey and has stayed roughly flat since 2020, despite the explosion in sleep trackers, supplements and mattress marketing over the same period.

  1. 30.5% of US adults slept less than seven hours in an average 24-hour period in 2024.
  2. The rate was almost identical for men and women, at 30.6% and 30.4%.
  3. The confidence interval on that headline figure is narrow, at 29.8% to 31.1%.
  4. A separate CDC analysis of Behavioral Risk Factor Surveillance System data put short sleep at 33.2%, using a stricter cut-off of six hours or fewer across 390,193 respondents.
  5. The AASM recommends adults get seven or more hours per 24 hours.
  6. The American Heart Association puts the optimal range at seven to nine hours.

The gap between numbers 1 and 4 is not a trend. The two surveys ask different questions and draw the line in different places. If you only want one figure, use 30.5% and name the year.

How many people wake up feeling rested?

Slightly more than half. Duration and quality are different things, and the federal data now tracks both. One pattern stands out: trouble *falling* asleep is a younger-adult problem, while trouble *staying* asleep gets worse with age.

  1. 54.8% of adults woke up feeling well-rested most days or every day in 2024.
  2. Men were more likely than women to wake rested, at 58.2% against 51.7%.
  3. 15.4% of adults had trouble falling asleep most days or every day.
  4. That figure falls steadily with age, from 18.3% among 18- to 34-year-olds to 12.8% among those 65 and over.
  5. 18.1% had trouble staying asleep, and here the pattern reverses: it climbs from 12.7% in the youngest group to 22.3% among 50- to 64-year-olds.

Who sleeps worst in America?

Black adults have by a clear margin the highest rate of short sleep, and Asian adults report the best sleep on every measure the CDC tracks. The worst age band is middle age rather than old age, which surprises most people.

  1. 40.2% of Black non-Hispanic adults slept under seven hours, against 28.9% of White, 29.0% of Hispanic and 27.9% of Asian adults.
  2. Adults aged 50 to 64 had the highest rate of short sleep at 34.5%, while the 18–34 and 65-plus groups tied for the lowest at 27.2%.
  3. Asian adults were the most likely to wake rested at 61.5%; Black adults the least, at 51.4%.
  4. White adults reported the most trouble staying asleep, at 20.7%, compared with 9.2% of Asian adults.
  5. In the BRFSS analysis, Black adults had 1.56 times the adjusted odds of short sleep compared with White adults, and American Indian or Alaska Native adults 1.46 times.

How common is sleep apnea?

Far more common than diagnosis rates suggest. Estimates of how many Americans have obstructive sleep apnea have risen sharply in recent years, largely because researchers use a broad diagnostic threshold. The finding that holds up regardless of method is that most cases go undetected.

  1. One widely cited 2025 modelling study estimated 83.7 million US adults aged 20 and over have obstructive sleep apnea, or 32.4%.
  2. That study put prevalence at 39.1% in men and 26.0% in women.
  3. Severity broke down as roughly 52% mild, 30% moderate and 18% severe.
  4. Around 80% of US sleep apnea is believed to be undiagnosed, with published estimates of underdiagnosis running from 80% to 98%.
  5. Among patients hospitalised for cardiovascular disease, pooled sleep apnea prevalence reached 48%.

A caution on number 17: that estimate uses a generous diagnostic threshold and comes from a single study with industry ties. Treat it as an upper bound, not a settled fact.

How many people have insomnia?

Between 5% and 15% of adults meet the criteria for chronic insomnia disorder, while a much larger share experience insomnia symptoms at some point. The treatment picture is clearer than the prevalence one: therapy outperforms medication over the long run, and every major sleep body says so.

  1. Chronic insomnia disorder affects an estimated 5% to 15% of adults.
  2. Insomnia symptoms, a broader category, occur in 35% to 50% of adults.
  3. Cognitive behavioural therapy for insomnia is the recommended first-line treatment, endorsed by the American College of Physicians, the AASM and international sleep societies.
  4. In a network meta-analysis, starting with CBT-I produced long-term remission in 41% of patients, against 28% for those who started with medication.
  5. Rates of concurrent insomnia in people with depressive disorders run as high as 80% to 90%.

What percentage of adults snore?

Somewhere between a quarter and half, depending entirely on how you define snoring. This is one of the widest ranges in sleep research, and any page quoting a single confident figure is hiding the definitional problem.

  1. Roughly 25% to 50% of adults snore regularly.
  2. The AASM puts habitual snoring at about 40% of adult men and 24% of adult women, and estimates that around half of people snore at some point in life.
  3. About half of people who snore loudly have obstructive sleep apnea.

How common are restless legs, narcolepsy and sleepwalking?

Narcolepsy is genuinely rare, at roughly four people in every 10,000. Restless legs syndrome and sleepwalking both carry enormous published ranges, because prevalence depends on how strictly researchers screen out look-alike conditions.

  1. Narcolepsy type 1 affects about 19.1 per 100,000 people and type 2 about 23.3 per 100,000, based on representative general-population samples.
  2. Global restless legs syndrome prevalence among adults aged 20 to 79 was modelled at 7.12%, or around 356 million people.
  3. Once RLS mimics are excluded, prevalence estimates drop to 0.4% to 2.4%.
  4. Women are affected by RLS up to twice as often as men, with risk rising alongside number of births.
  5. A meta-analysis of 51 studies covering 100,490 people put lifetime sleepwalking prevalence at 6.9%, with past-year rates of 5.0% in children and 1.5% in adults.

What actually happens while you sleep?

You move through cycles of roughly 90 minutes, alternating between three stages of non-REM sleep and REM. Deep sleep is front-loaded into the early cycles and REM into the later ones, which is why the last few hours of a night matter more than people assume.

  1. A complete sleep cycle lasts 90 to 110 minutes, and most people go through four to six per night.
  2. The first REM period arrives about 90 minutes after falling asleep.
  3. Around 75% of sleep is spent in non-REM stages, most of it in stage N2.
  4. The first REM period lasts roughly 10 minutes; the final one can run up to an hour.
  5. Your arm and leg muscles are temporarily paralysed during REM, which stops you acting out dreams.
  6. Adenosine builds up through the day to create sleep pressure, and caffeine works by blocking it.
  7. A landmark 2013 Science study found that sleep drives clearance of metabolic waste from the brain, including amyloid-beta. The work was done in mice, and later research in mice has linked that clearance to norepinephrine oscillations during non-REM sleep.

How does sleep affect physical health?

Enough that the American Heart Association added it to its core checklist of cardiovascular health measures in 2022. The most persuasive evidence is a randomised trial showing that simply sleeping longer changed how much people ate, without any other instruction.

  1. In 2022 the AHA added sleep duration to its cardiovascular checklist, renaming it Life's Essential 8 alongside blood pressure, cholesterol, glucose, weight, diet, activity and nicotine exposure.
  2. In a randomised trial at the University of Chicago, adults who extended their sleep ate about 270 fewer calories a day than the control group.
  3. Those participants gained an average of 1.2 hours of sleep a night after a single counselling session.
  4. Calorie intake was measured by the doubly labelled water method, and participants did not know it was being measured.
  5. In a study where volunteers were deliberately exposed to a cold virus, shorter sleep measured by wrist actigraphy predicted a higher chance of actually developing a cold.
  6. People sleeping under six hours around a hepatitis B vaccination had roughly 3.8 times the odds of failing to reach the protective antibody threshold.

Is there a link between sleep and dementia?

The best evidence comes from a British cohort followed for 25 years, which found that consistently sleeping six hours or less in midlife was associated with about a 30% higher dementia risk. Association is not causation, and the researchers were careful about that.

  1. Persistent short sleep at ages 50, 60 and 70 was associated with a 30% higher dementia risk compared with persistent normal sleep.
  2. The hazard ratio was 1.22 for six hours or less at age 50 and 1.37 at age 60.
  3. The study followed 7,959 participants and recorded 521 dementia cases over 25 years.
  4. No significant link was found between sleeping eight or more hours and dementia risk.

The obvious objection is reverse causation, since early dementia disrupts sleep. The authors addressed it partly by measuring sleep more than two decades before typical onset, and the association did weaken at age 70, which is roughly what you'd expect if some of those cases were already underway.

How much sleep do teenagers get?

Less than at any point on record. Fewer than a quarter of US high school students get the eight hours the AASM recommends, down from nearly a third a decade ago. California's mandated later start times are the closest thing to a controlled experiment, and the first results arrived this month.

  1. 23% of US high school students got at least eight hours on an average school night in 2023.
  2. That is down from 32% in 2013.
  3. Teen girls fared slightly worse than boys, at 22% against 25%.
  4. The Healthy People 2030 target is 27.4%, and the official status of the objective is "getting worse".
  5. The AASM recommends 8 to 10 hours for teenagers aged 13 to 18.
  6. California's SB 328, in force since 2022, requires high schools to start no earlier than 8:30am and middle schools no earlier than 8:00am.
  7. Early findings from a 2026 working paper suggest the law raised the share of students sleeping eight or more hours by around 13%, with reported improvements in mental health and in eighth-grade maths and English scores.

Number 58 comes from a working paper that has not yet been peer reviewed, and at least one summary of the same research reported weaker academic effects. The sleep finding is the solid part.

How much sleep do babies and children need?

It depends heavily on age, and the AASM publishes banded recommendations endorsed by the American Academy of Pediatrics. On infant safe sleep, the news this year is not good: the sudden unexpected infant death rate has started rising again after two decades of no progress.

  1. Infants aged 4 to 12 months need 12 to 16 hours per 24 hours, including naps.
  2. Children aged 1 to 2 need 11 to 14 hours, and children 3 to 5 need 10 to 13 hours.
  3. Children aged 6 to 12 need 9 to 12 hours.
  4. The AASM deliberately issued no recommendation for infants under 4 months, because normal variation is too wide and the evidence too thin.
  5. About 3,400 infants die of sudden unexpected infant death in the US each year.
  6. The SUID rate rose from 92.9 to 100.9 per 100,000 live births between 2020 and 2022, after falling from 154.6 in 1990 to 93.9 in 1999.
  7. Two-thirds of those deaths, 66%, occur in the first three months of life.
  8. Between 2018 and 2022, state SUID rates ranged from 45.0 per 100,000 in Massachusetts to 221.9 in Mississippi, against a national average of 94.8.

How does pregnancy affect sleep?

Sleep problems become the norm rather than the exception, and they worsen through the third trimester. The hardest period, though, is not pregnancy itself. It's the first month after delivery.

  1. Insomnia prevalence rises from around 25% in the first trimester to over 40% in the third.
  2. A meta-analysis found roughly 38% of pregnant women experience insomnia, 15% obstructive sleep apnea and 20% restless legs syndrome.
  3. In one cohort, poor sleep quality was reported by 34% of women in the first trimester, 46% in the third, and 71% in the first month postpartum.
  4. Daytime sleepiness runs the other way, peaking at 30% in the first trimester and easing to 22% by the third.
  5. Poor sleep in pregnancy is associated with increased odds of preterm birth, cesarean section, hypertension and gestational diabetes.

What does sleep loss cost?

The standard estimate is up to $411 billion a year in the US, or about 2.28% of GDP. It comes from a RAND analysis that is now a decade old and has never been updated, so date it whenever you use it. The road safety numbers are fresher, and they contain the single most striking discrepancy in this entire field.

  1. RAND estimated the annual US cost of insufficient sleep at up to $411 billion, equivalent to 2.28% of GDP.
  2. The same analysis put working days lost at around 1.2 million a year.
  3. Moving people who sleep under six hours into the six-to-seven-hour range could add $226.4 billion to the economy.
  4. An estimated 17.6% of US fatal crashes between 2017 and 2021 involved a drowsy driver.
  5. That amounts to 29,834 deaths over the five-year period.
  6. The official NHTSA figure is about 2.4% of fatal crashes, roughly ten times lower. NHTSA itself acknowledges that drowsy driving is underestimated.
  7. Around two-thirds of drowsy drivers in fatal crashes had a blood alcohol concentration of zero.

How many Americans take something to help them sleep?

About one in eight uses a sleep aid most nights. The newest federal data splits that into prescription drugs, over-the-counter products and cannabis, and the cannabis figure behaves differently from the rest.

  1. 12.9% of adults used a sleep aid most days or every day in 2024.
  2. That breaks down as 5.2% prescription, 5.7% over-the-counter, and 3.7% marijuana or CBD.
  3. Women used sleep aids more than men, at 14.8% against 10.8%.
  4. Prescription use climbs steeply with age, from 2.2% of 18- to 34-year-olds to 8.8% of those 65 and over.
  5. Cannabis and CBD use runs the opposite way, falling from 5.5% of under-35s to 1.7% of over-65s.
  6. Melatonin use among US adults rose from 0.4% in 1999–2000 to 2.1% in 2017–18, based on 55,021 NHANES respondents.

Do sleep trackers and sleeping apart actually help?

About half of American adults track their sleep with some device, and a measurable minority end up anxious about the numbers. Roughly a third have slept separately from a partner to get better rest, and it peaks in midlife rather than old age.

  1. 52% of US adults use no sleep-tracking device at all.
  2. Among those who do, 23% use a smartphone app and 20% a smartwatch, with rings at 7%.
  3. 81% of adults aged 65 and over track nothing.
  4. Estimated prevalence of orthosomnia, meaning anxiety about sleep scores, ranges from 3% to 14% depending on how strictly it's defined.
  5. 31% of US adults have tried a "sleep divorce", sleeping in another bed or room to accommodate a partner.
  6. It peaks among 35- to 44-year-olds at 39% and is lowest among the over-65s at 18%.

Does a dark, quiet, cool bedroom really matter?

Darkness has the strongest evidence behind it, and it's newer and more serious than most people realise. Two 2024 studies using wrist light sensors on around 89,000 people linked brighter nights to higher mortality and higher diabetes risk, in a dose-dependent way.

  1. People in the brightest decile of night-time light exposure had a 21% to 34% higher risk of all-cause mortality than those in the darkest half.
  2. The same group had a 33% to 46% higher risk of cardiometabolic illness.
  3. Those findings draw on about 13 million hours of wrist light-sensor data from roughly 89,000 UK Biobank participants over eight years.
  4. In a parallel analysis, the brightest decile was about 1.5 times more likely to develop type 2 diabetes, independent of genetic predisposition.
  5. The World Health Organization recommends continuous bedroom noise stay below 30 dB(A), with single sound events under 45 dB.
  6. Measured bedroom noise often exceeds that. In one US sample not exposed to traffic noise, the mean was still 37.8 dB overnight.

On temperature, the widely repeated "65°F is ideal" figure has no traceable source, so we've left it out. What the research does show is that in adults over 65, bedroom temperatures above 24°C were associated with signs of physiological stress overnight.

How long before bed should you stop caffeine and alcohol?

Six hours for caffeine, and three to four for alcohol. Both have a similar catch: people consistently fail to notice the disruption they cause, which is why self-assessment is a poor guide here.

  1. A 400mg dose of caffeine, roughly two to three cups of coffee, taken six hours before bed cut objectively measured total sleep time by more than an hour.
  2. In that study, participants' own reports suggested they were unaware of the disruption.
  3. A meta-analysis of 27 studies found that even a low dose of alcohol, around two standard drinks, reduces REM sleep.
  4. Alcohol shortens the time it takes to fall asleep, then fragments the second half of the night. A 2026 review recommends avoiding it within three to four hours of bedtime.

A note on daylight saving time and shift work

Two claims you'll see repeated as settled are genuinely contested, and it's worth knowing before you quote them.

On clock changes: older studies found a spike in heart attacks after springing forward, including a 24% rise on the Monday following the switch in a Michigan hospital analysis. But the largest study yet, published in *JAMA Network Open* in September 2025, examined 168,870 hospital visits across more than 1,100 hospitals and found no significant difference in heart attack rates around either transition. It used Arizona and Hawaii, which don't observe daylight saving, as controls. The AASM's position remains that the US should abolish seasonal clock changes in favour of permanent standard time.

On night work: the International Agency for Research on Cancer classified night shift work as probably carcinogenic in 2019, a judgement resting substantially on animal and mechanistic evidence, with human epidemiological evidence described as limited. A meta-analysis of ten prospective studies covering 4,660 breast cancer cases found little or no effect on breast cancer incidence. Both findings are real.

Frequently asked questions

What percentage of Americans are sleep deprived?

About 30.5% of US adults sleep less than the recommended seven hours, according to CDC data collected in 2024 and published in April 2026. A separate CDC analysis using a six-hour cut-off puts it at 33.2%. Both point to roughly one in three.

Has American sleep been getting worse over time?

Adult sleep has been broadly flat since 2020, hovering around 30% getting insufficient sleep. Teen sleep is a different story: the share of high school students getting eight hours fell from 32% in 2013 to 23% in 2023, according to the CDC's Youth Risk Behavior Survey.

How many people have undiagnosed sleep apnea?

Roughly 80% of US sleep apnea cases are thought to be undiagnosed, with published estimates of underdiagnosis ranging from 80% to 98%. Total prevalence estimates vary widely depending on the diagnostic threshold used, so the undiagnosed share is the more reliable figure.

Which sleep statistics are most often quoted incorrectly?

Three stand out. The "72% of high schoolers" figure comes from 2015 data. The $411 billion economic cost is a 2016 RAND estimate that was never updated. And the common claim that 65°F is the ideal bedroom temperature has no identifiable primary source.

Do sleep trackers improve your sleep?

For some people. Around 48% of US adults use one, according to a 2025 AASM survey. But between 3% and 14% show signs of orthosomnia, where anxiety about the sleep score itself starts interfering with sleep.

Where these numbers come from

Every statistic on this page carries a year and a named source. Almost all of them are primary sources, meaning the agency that collected the data or the journal that first published the finding, rather than another statistics roundup quoting a third party.

Three rules shaped what made it in. Where a figure rests on a single study, we hedged the language. Where credible research disagrees, we gave both sides instead of picking the tidier one. And where a widely repeated number could not be traced back to a real source, we left it out and said so.

Federal and international health agencies

  • Centers for Disease Control and Prevention, National Center for Health Statistics: National Health Interview Survey, reported in Data Brief No. 559 and Health E-Stat No. 116 (both April 2026)
  • CDC Behavioral Risk Factor Surveillance System, analysed in the CDC journal Preventing Chronic Disease
  • CDC Youth Risk Behavior Survey, Data Summary and Trends Report 2013–2023
  • CDC Morbidity and Mortality Weekly Report, on sudden unexpected infant death (September 2026)
  • National Health and Nutrition Examination Survey (NHANES)
  • National Institute of Neurological Disorders and Stroke, Brain Basics: Understanding Sleep
  • National Highway Traffic Safety Administration
  • Office of Disease Prevention and Health Promotion, Healthy People 2030
  • World Health Organization, Guidelines for Community Noise
  • International Agency for Research on Cancer

Medical bodies and research institutions

  • American Academy of Sleep Medicine, including its pediatric and adult consensus statements, clinical practice guidelines, and 2025 Sleep Prioritization Survey
  • Sleep Research Society
  • American Academy of Pediatrics
  • American Heart Association, Life's Essential 8
  • American College of Physicians
  • American Medical Association
  • AAA Foundation for Traffic Safety
  • RAND Corporation

Peer-reviewed journals

  • Science, Cell, Proceedings of the National Academy of Sciences, Nature Communications
  • JAMA, JAMA Internal Medicine, JAMA Network Open, JAMA Otolaryngology–Head & Neck Surgery
  • The Lancet Regional Health – Europe
  • SLEEP, Journal of Clinical Sleep Medicine, Sleep Medicine
  • Frontiers in Medicine, Current Psychiatry Reports, Brain Sciences

Two long-running cohort studies do a lot of the heavy lifting in the health sections: UK Biobank, which supplied the light exposure and brain imaging findings, and Whitehall II, the British civil service study behind the dementia figures.

If you act on one thing here, make it the darkness. Most sleep advice asks you to change a habit, and habits are hard. Getting your bedroom properly dark takes one evening and a decent pair of curtains.

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