Baby and toddler sleep statistics: the research, figure by figure

Here are 35 findings, one sentence apiece, every one verified against its linked source on November 9, 2026. Each number appears exactly as the source reports it. When a study used a particular sample or definition, we include it in the sentence, since a figure stripped of its denominator is easy to misquote.

All of these numbers describe large groups of children. None of them can explain why your own baby wakes at 2 a.m. or naps for just 30 minutes. Answering that question is Actually Sleeping’s job, one family at a time, through a sleep plan written for that particular baby and daily 1:1 support while it settles in.

Recommended sleep: the official ranges

Finding	Year	Source
For infants 4–12 months, an expert panel of 13 from the American Academy of Sleep Medicine (AASM) recommends 12–16 hours of sleep per 24 hours, including naps.	2016	source
For children 1–2 years, that AASM consensus recommends 11–14 hours per 24 hours, including naps.	2016	source
For children 3–5 years, the AASM recommends 10–13 hours per 24 hours, including naps.	2016	source
Below 4 months the AASM gives no recommendation, pointing to how widely normal sleep varies at that age and to insufficient evidence tying sleep to health outcomes.	2016	source

Normal infant sleep, in numbers

Finding	Year	Source
Pooling 34 studies, a systematic review reported mean infant sleep of 12.8 hours per 24 hours, with a reference range from 9.7 to 15.9 hours.	2012	source
That review also found that, for babies 0–2 months, reported night waking ran from 0 to 3.4 wakes per night.	2012	source
Among 388 infants in a cohort, between 27.9% and 57.0% of 6- and 12-month-olds were not sleeping through the night, with the figure depending on whether the definition was 6 or 8 hours of uninterrupted sleep.	2018	source
Within that cohort, whether a baby slept through the night showed no significant association with mental development, psychomotor development or the mother’s mood.	2018	source
According to a meta-analysis of napping, under 2.5% of children give up naps before age 2.	2020	source
That meta-analysis also found that by age 5, 94% of children no longer nap.	2020	source

How often parents report sleep problems

Finding	Year	Source
When parents of 2,154 children aged 0–3 years in Australia and New Zealand were surveyed, 30.69% reported that their child had a sleep problem.	2012	source
In a sample of 29,287 children aged 0–3 years from 17 countries and regions, parents reporting a child sleep problem ranged from 11% in Thailand up to 76% in China.	2010	source
Among 10,085 children aged 0–5 years in 13 countries and regions, the more consistent the bedtime routine, the better the sleep outcomes, in a dose-dependent pattern; this was a correlational study.	2015	source

How common a “problem” appears to be depends a great deal on who is asked and how the word is defined. Most of these figures come from questionnaires filled in by parents rather than from clinical diagnosis.

Behavioral approaches to sleep

Finding	Year	Source
Reviewing 52 treatment studies, an AASM task force found that 94% reported behavioral interventions to be effective, and more than 80% of treated children showed clinically significant improvement that held for 3 to 6 months.	2006	source
The same review found strong support for unmodified extinction and for preventive parent education, along with support for graduated extinction, bedtime fading/positive routines and scheduled awakenings.	2006	source
In a cluster randomized trial involving 328 mothers who reported an infant sleep problem at 7 months, a behavioral intervention reduced sleep problems: 56% vs 68% at 10 months, and 39% vs 55% at 12 months.	2007	source
When that trial followed up at 2 years, depression symptoms above the Edinburgh Postnatal Depression Scale community cut point were found in 15.4% of intervention mothers compared with 26.4% of control mothers.	2008	source
A randomized trial of 43 infants aged 6–16 months found large reductions in time to fall asleep with both graduated extinction and bedtime fading; graduated extinction additionally led to large reductions in night awakenings.	2016	source
By that trial’s 12-month follow-up, the groups did not differ significantly in emotional and behavioral problems or in secure-insecure attachment.	2016	source

How parents sleep

Finding	Year	Source
A German panel of 2,541 women and 2,118 men found mothers’ sleep after a first baby hit its low point in the first 3 months, at 62 minutes shorter than before pregnancy (13 minutes for fathers), and had not fully recovered for up to 6 years.	2019	source

Finding	Year	Source
In 2024 the United States had about 3,400 sudden unexpected infant deaths (SUID).	2024 data	source
Of the 2024 total, SIDS accounted for 1,351, unknown causes for 1,099 and accidental suffocation and strangulation in bed for 947.	2024 data	source
Across 2020–2024, the average U.S. SUID rate was 106.6 per 100,000 live births.	2020–2024 data	source
CDC case registry data covering 4,861 SUIDs in 2020–2024 showed that 66% of the infants were 0–3 months old.	2026	source
That registry analysis identified unsafe sleep factors in at least 73% of cases.	2026	source
Over 90% of SIDS deaths happen before 6 months of age, with 72% falling in months 1–4.	accessed 2026	source
Surveyed in 2015 across 32 states and New York City, 21.6% of mothers said they put their infant to sleep in a non-back (side or stomach) position.	2018	source
In that same 2015 survey data, any bed sharing was reported by 61.4% of respondents in 14 states, and use of at least one type of soft bedding by 38.5% in 13 states and New York City.	2018	source
The AAP recommends sharing a room without sharing a bed for at least the first 6 months, and says doing so can lower SIDS risk by as much as 50%.	2026 (page update)	source

SUID is the broad term for any sudden, unexpected death of a baby under 1 year old; SIDS is one kind of SUID. You will find definitions in the sleep glossary.

Young children and melatonin

Finding	Year	Source
Between 2012 and 2021, U.S. poison control centers received 260,435 reports of pediatric melatonin ingestion; the yearly count climbed 530%, from 8,337 to 52,563.	2022	source
Of those ingestions, 94.3% were unintentional; 4,097 children were admitted to hospital, and two children died.	2022	source
In 2019–2022, an estimated 10,930 emergency department visits by children aged 5 and under involved unsupervised melatonin ingestion, making up 7.1% of all such visits for unsupervised medication exposures; gummies were the form documented most often (47.3%).	2024	source
When 25 melatonin gummy products sold in the U.S. were tested in a laboratory, their actual melatonin content ran from 74% to 347% of the amount on the label.	2023	source
A 2023 parent survey (convenience sample) found that 5.6% of children aged 1–4 years had taken melatonin in the previous 30 days.	2023	source

According to the AAP’s parent site, over-the-counter melatonin is not regulated by the FDA for this purpose and should be used only after talking it over with your pediatrician. Read is melatonin safe for babies.

Products in the sleep environment

Finding	Year	Source
Every one of the 14 infant sleep machines tested reached maximum sound levels above 50 A-weighted decibels at 30 cm, and three went beyond 85 decibels.	2014	source

Reading these figures correctly

Years. The “Year” column shows when the source was published, or the year of the data when the source is a statistics page. “Accessed 2026” flags a web page with no date.
Association is not causation. Findings from surveys and cohorts (routines, sleeping through the night) show only associations. The rows describing trials are randomized.
Country. Figures on deaths and melatonin are from the U.S. Each prevalence study is labelled with its countries.
No rule-of-thumb ranges here. Wake windows and nap lengths are practice conventions rather than research findings, so they live on the wake window calculator with clear labels.

Citing this page

Actually Sleeping. “Baby and toddler sleep statistics: the research, figure by figure.” https://actuallysleeping.net/guides/baby-sleep-statistics/ (checked November 9, 2026). When citing an individual figure, please cite the original source linked in that row.

Turning averages into a plan for your baby

As the research shows, behavioral approaches to infant sleep problems have been studied extensively. What research cannot do is tailor one to your child’s age, feeds, temperament and household schedule. That tailoring is what Actually Sleeping provides: a custom plan written by Dr. Sam, a Doctor of Pharmacy, bootcamp-style coaching ahead of the first night, daily 1:1 check-ins and naps coached until they are solid. It is neither cry it out nor wait it out. We have coached more than 700 families, and parents share their results in the client video reviews.

If your baby’s sleep is a statistic you would like to change, book the free consultation.

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Common questions

What share of babies sleep through the night at 6 months?

That depends on how you define it. A 2018 Pediatrics cohort of 388 infants found that 27.9% to 57.0% of 6- and 12-month-olds were not sleeping through, with 6 or 8 hours of uninterrupted sleep as the threshold. Not sleeping through showed no link to developmental delay or to the mother’s mood.

How many babies and toddlers have sleep problems?

Parent surveys give very different answers. In 2012, 30.69% of parents of 2,154 children aged 0–3 in Australia and New Zealand reported a sleep problem. Across 17 countries and regions in 2010, the share ran from 11% in Thailand to 76% in China.

What does the research say about whether sleep training works?

Reviewing 52 studies in 2006, an AASM task force found that 94% reported behavioral interventions effective, and over 80% of children improved for 3 to 6 months. A randomized trial in 2016 found no differences in emotional or behavioral problems or in attachment at the 12-month follow-up.

How many US babies die of SIDS each year?

For 2024, the CDC reports about 3,400 sudden unexpected infant deaths: 1,351 from SIDS, 1,099 from unknown causes and 947 from accidental suffocation and strangulation in bed. According to the NICHD, over 90% of SIDS deaths occur before 6 months.

Are more children being poisoned by melatonin?

Yes. According to CDC data, pediatric melatonin ingestions reported to U.S. poison control centers grew 530% between 2012 and 2021, reaching 52,563 a year. Most were accidental. A CDC report in 2024 estimated 10,930 emergency visits by children 5 and under during 2019–2022.