Is the US birth rate declining?
Yes — by every standard measure. The U.S. total fertility rate stands at 1.62 births per woman as of 2023, the lowest reading in the nation's recorded history. The 2024 final count of 3,628,934 births is roughly 16% below the 2007 all-time peak of 4,316,233.
The 2024 final was actually a one-year uptick of about 1 percent over 2023. Provisional 2025 data put the figure at 3,606,400 births — back down by about 1 percent — so the 2024 bump did not hold. The longer-run picture is unambiguous.
When was the US birth rate highest?
Two answers, and which one matters depends on what you mean by "birth rate". The rate per woman peaked in the 1957 Baby Boom at a total fertility rate of 3.77 — Americans were having far more children per family than they do today. The raw number of births didn't peak until five decades later, in 2007, at 4,316,233.
That gap is the page's central point. The 2007 number peak wasn't a fertility boom — per-woman fertility had been drifting near replacement for years and was about to fall. It happened because the U.S. population was much larger than it had been at the 1957 rate peak, so even a lower per-woman rate produced more children overall.
The chart's Births / GFR toggle is built for exactly this comparison. The births line peaks at 2007; the general-fertility-rate line peaks decades earlier and is in steady descent by 2007. Toggle between them with 2007 in focus and the "most births ever / record- low fertility" pair-of-facts becomes legible.
When did US fertility fall below replacement?
1972. The total fertility rate dropped below the conventional replacement level of 2.1 births per woman, and it has stayed there ever since — with one brief exception, a brush at 2.12 in 2007 that lasted a single year. The U.S. has now been below replacement for over fifty years.
The four sourced milestones above tell the story without over-claiming. TFR is not in this page's dense annual dataset — it's a separate CDC/NCHS series — so the strip shows the verified milestone values as labelled points, not as a derived curve. The shaded band marks the years since 1972 below replacement.
Why is the US birth rate falling?
Researchers consistently name several factors together, not a single cause. CDC/NCHS data briefs and academic demographers point first to later childbearing: women are starting families further into their lives than their mothers or grandmothers did.
The numbers are sharp. The mean age at first birth in the United States was 21.4 years in 1970; it rose to 24.9 by 2000, and most recently to 27.5 in 2023 — a shift of about 6.1 years over roughly five decades. The endpoint is from NVSR 74-9 ("Trends in Mean Age of Mothers, 2016–2023," June 2025); the 1970 and 2000 values are from the earlier NCHS Mean Age of Mother series.
The composition of new mothers has shifted with that age. Women aged 30–34 are now the single largest age group of mothers in the U.S., accounting for about 28.9% of births — a position that age cohort did not hold a generation ago. Later first births mechanically lower a period fertility rate, because a smaller share of any given year's reproductive-age women are actively having children.
Record-low teen birth rates are the second major contributor. The rate for women aged 15–19 has fallen from a modern peak of 61.8 per 1,000 in 1991 to 13.1 in 2023 — about a 79% decline over a single generation. The fall continued in the latest CDC releases: 12.7 per 1,000 in 2024 (final) and a provisional 11.7 in 2025 (down another 7%, per CDC NVSS).
That decline removes births from the youngest cohort, where fertility historically ran highest. More women are also remaining childless at older ages than in earlier cohorts — a third compositional shift that pushes the period rate further down.
Economic factors appear repeatedly in the literature too. Housing costs, student debt, and childcare costs are all named by CDC briefs and demographic-research summaries as plausible drivers of delayed or foregone childbearing. None of these is offered as a settled single-cause explanation; the consistent framing is that several mutually reinforcing factors are acting at once.
The earlier 1970s decline — the one that first carried the U.S. below replacement — is most often attributed to expanded contraception access and women entering the workforce in larger numbers. The 2002 NCHS release accompanying the Mean Age of Mother report framed it as "educational opportunities and career choices for women," noting that women's college completion roughly doubled between 1970 and 2000 and that female labor-force participation rose by about 40% over the same span.
That framing is widely cited in demographic histories, and it's the right one to read as "the factors researchers point to," not as a single-cause claim. The throughline across both eras — the 1970s drop and the post-2007 decline — is the same: U.S. women, on average, are choosing to have children later, fewer of them, or not at all, and a combination of educational, economic, and cultural shifts is what the evidence keeps pointing to.
Where does today sit in U.S. history?
At 1.62 births per woman in 2023 — and roughly 1.60 in 2024 by early estimates — the U.S. total fertility rate is at its lowest recorded level. That figure sits well below the 3.77 Baby Boom peak in 1957 and below the brief 2.12 brush at replacement in 2007, the only year since 1972 that the rate touched 2.1 at all.
The crude birth rate — births per 1,000 total population — traces the same arc on a different scale. From 23.7 per 1,000 in 1960 it fell to 14.4 by 2000, 13.0 by 2010, and 10.9 by 2020 — each successive decade lower than the last. (Figures from this page's vendored CSV, which carries the primary-verified CDC/NCHS series.)
The 2024 final births count — 3,628,934 — is still the second-highest annual U.S. births total of the post-2007 decline, but it sits roughly 16% below the 2007 all-time peak. Provisional 2025 (3,606,400) drifted back down. Whether the 2024 uptick was a one-year fluctuation or the start of a turn won't be clear until the next full NVSR release.
This is a developed-world pattern, broadly. Most high-income countries are below replacement. The full international picture — and where the U.S. sits in it — is in the next section.
For the current-snapshot framing (how many U.S. babies today? how many a second worldwide?), see the Birth Statistics hub — this page owns the historical arc and the "why".
The US in international context
Per the UN World Population Prospects 2024 Revision, global TFR has dropped from 3.31 in 1990 to 2.25 in 2024 — 131 of 237 countries (55%) are now below the 2.1 replacement level. Population fall has stopped being a developed-world peculiarity and is the majority pattern globally.
The U.S. at 1.62 (UN WPP 2024) sits well below the 2.1 replacement line but above the two UN-named ultra-low groupings. UN names China, Italy, South Korea, and Spain among the ultra-low cluster (below 1.4 births per woman). A tighter sub-1.0 club — also UN-named — now exists: China, South Korea, Singapore, and Ukraine. These are illustrative UN-named groupings; UN doesn't claim either list enumerates all countries beneath its threshold.
The other end of the distribution holds the few remaining high-fertility populations. UN identifies Niger, Chad, and Somalia near 6 births per woman, all in sub-Saharan Africa. Even there the trend is downward — every UN-WPP region has lower TFR than it did in 1990, just at different speeds and starting points. The U.S. is below replacement but is not at the extreme of the global distribution.
All figures in this section: United Nations, World Population Prospects 2024 Revision. Per-country precision is shown only for the United States (1.62), the threshold values (1, 1.4, 2.1), the global figures (2.25 and 3.31), and the high-fertility band (~6) — all UN-direct. Other countries appear in their UN-named clusters without invented precision.