Mexico’s fertility rate has fallen from 5.7 children per woman in 1976 to somewhere between 1.6 and 1.91 today, depending on the source, a decline of roughly two-thirds in under fifty years. In 2020, for the first time in recorded history, Mexico’s fertility rate dropped below that of the United States, its northern neighbor long associated with comparatively higher immigrant-driven fertility. Mexico is not becoming an aging country overnight. It is, however, moving through a demographic transition faster than most of its own population realizes.
Mexico Is Moving Through a Major Demographic Transition
Demographers describe the demographic transition as the shift a country makes from high birth and death rates to low birth and death rates, typically accompanied by a period of rapid population growth in between as death rates fall faster than birth rates.
Mexico entered this transition later than Western Europe but has moved through its stages considerably faster; Wikipedia’s demographic overview notes the country’s annual population growth rate fell from a peak of 3.5 percent in 1965 to below 1 percent by 2005, and Mexico is now considered to be transitioning into the later stages of that same process.
Mexico’s Population Is Still Large and Relatively Young
Mexico’s population reached an estimated 131,946,900 in 2025, according to figures compiled from national and international sources, with a population density of roughly 66.3 people per square kilometer as of 2024 estimates. Population Pyramids data for 2025 characterizes Mexico as having a favorable age dependency ratio of 48.4 and a working-age population share of 67.4 percent, a combination it describes as an “optimal demographic dividend window,” the period in a country’s demographic transition when the working-age share of the population is at its highest relative to dependents, typically lasting 20 to 30 years and associated with accelerated economic development potential through higher savings, investment capacity, and productivity.
Fertility Has Fallen Dramatically
Different sources put Mexico’s current fertility rate at slightly different levels depending on methodology and reference year: the CIA World Factbook-derived Wikipedia estimate cites 1.60 children per woman for 2023, while Our World in Data, using UN-sourced figures, cites 1.91 births per woman for the same year.
Both figures represent a steep decline from the 5.7 children per woman recorded in 1976, and both sit at or below the 2.1 replacement level, a threshold Mexico’s fertility rate first approached during the 2010s and has now fallen below regardless of which specific estimate is used.
Mexico’s Fertility Rate, Selected Years
| Year | Total Fertility Rate |
|---|---|
| 1976 | 5.7 |
| 2020 | 1.9 |
| 2023 (Wikipedia/CIA estimate) | 1.60 |
| 2023 (Our World in Data/UN estimate) | 1.91 |
Mexico’s fertility decline accelerated sharply around the COVID-19 pandemic: fertility fell 22 percent in 2020 alone, according to Wikipedia’s demographic profile, with a further 10.5 percent decline in the first half of 2021, a pandemic-linked drop steep enough to be a distinct feature of Mexico’s fertility trajectory rather than simply a continuation of the prior gradual decline.
The Shrinking Share of Children
Mexico’s under-15 population made up 23.3 percent of the total population as of 2024 estimates, still a substantial youth cohort in absolute terms, close to 30.4 million children, but down considerably from the near-50-percent share of the population under 25 recorded as recently as 2009. This narrowing base of the population pyramid is the direct mechanical consequence of three decades of falling fertility working its way through Mexico’s age structure.
Mexico’s Age Structure, 2024 Estimate
| Age Group | Share of Population |
|---|---|
| 0–14 years | 23.3% |
| 15–64 years | 68.6% |
| 65 and over | 8.2% |
Mexico’s Working Age Population
At 68.6 percent of the population as of 2024 estimates, Mexico’s working-age cohort sits near its historical peak, the defining feature of what demographers call the demographic dividend period. Population Pyramids’ 2025 analysis frames this directly: Mexico’s current combination of a 48.4 dependency ratio and 67.4 percent working-age share represents a limited window, typically 20 to 30 years, during which a country’s economic growth potential from favorable age structure alone is at its highest, a window that closes as the large working-age cohorts now in the labor force eventually age into retirement without a comparably sized younger cohort behind them.
Mexico’s Population Is Beginning to Age More Rapidly
Mexico’s median age has increased by 12.7 years, according to Population Pyramids’ 2025 analysis, a shift the source describes as one of the most consequential social and economic changes in the country’s modern history. The 65-and-over population share, at 8.2 percent as of 2024 estimates, remains modest by the standards of aging European economies, but it is the fastest-growing segment of Mexico’s age structure in relative terms, and life expectancy, at approximately 75.1 to 75.3 years depending on the source (INEGI, UN, and World Bank estimates converge closely around this figure), continues to support that growth from the longevity side of the equation.
Regional Differences in Mexico’s Demographic Transition
Mexico’s demographic transition has not proceeded uniformly across the country’s 32 federal entities. The state-level life expectancy data compiled from INEGI shows meaningful regional variation and, notably, at least one documented case of declining life expectancy: Campeche’s life expectancy fell from 76.30 years in 2010 to 75.07 years more recently, a decline Wikipedia’s state-level compilation attributes primarily to increased cartel-related violence within the state, illustrating that Mexico’s demographic transition, while broadly consistent with the national pattern of falling fertility and rising longevity, has not been immune to regional disruptions from insecurity.
Migration and the Demographic Transition
Mexico’s net migration rate stood at approximately negative 0.70 migrants per 1,000 population as of 2024 estimates, indicating the country continues to see modestly more emigration than immigration on net, a historically consistent pattern tied to sustained labor migration toward the United States, though this rate is considerably lower in magnitude than in earlier decades of Mexican emigration history.
What Aging Means for Mexico’s Economy and Society
Mexico’s current demographic profile, a large working-age population, a still-substantial youth cohort, and a comparatively small elderly population, positions the country favorably relative to aging economies elsewhere. Population Pyramids’ 2025 analysis frames this explicitly in a comparative context, describing Mexico as benefiting from “nearshoring as China ages,” a reference to the manufacturing and supply-chain relocation trend that has favored countries with younger, more cost-competitive workforces as China’s own working-age population contracts. The same source draws a comparison with Spain, contrasting “Spain’s aging crisis” with what it calls “Mexico’s demographic dividend,” a framing that positions Mexico’s current age structure as a competitive advantage relative to its historical colonial counterpart, now decades further along its own demographic transition.
Mexico’s Future Population
Mexico’s age dependency ratio stood at 49.0 dependents per 100 working-age people in 2023, according to Our World in Data’s country profile, a figure that reflects the current favorable balance during the demographic dividend window but will shift as Mexico’s large working-age cohorts eventually move into the 65-and-over category over coming decades.
Long-range UN and national population projections generally anticipate Mexico’s population growth continuing to slow through the coming decades as the fertility decline already underway continues working through the age structure, though the country’s youth population base remains large enough that Mexico is not expected to face the kind of near-term population decline already underway in parts of Europe and East Asia.
Conclusion
Mexico’s population data captures a country in the middle of its demographic transition rather than at either end of it. The fertility collapse that took just five decades to move Mexico from 5.7 children per woman to below the US rate has already reshaped the country’s youth population, while the working-age cohort built by that earlier era of higher fertility now sits at its largest relative share in Mexico’s modern history. What Mexico does with that temporary demographic advantage, before its own median age catches up further with its aging cohorts, will likely matter more to the country’s economic trajectory than almost any other single statistic in this data.
Key Findings
- Mexico’s fertility rate has fallen from 5.7 children per woman in 1976 to between 1.6 and 1.91 as of 2023 estimates, a decline of roughly two-thirds, and fell below the United States’ fertility rate for the first time in 2020.
- Mexico’s population reached an estimated 131.9 million in 2025, with a working-age share of 67.4 to 68.6 percent depending on source, positioning the country within its demographic dividend window.
- The under-15 population share fell to 23.3 percent by 2024, down substantially from close to half the population under 25 as recently as 2009.
- Mexico’s median age has risen by 12.7 years according to recent demographic analysis, though the 65-and-over share, at 8.2 percent, remains modest compared with aging economies in Europe and East Asia.
- Mexico’s net migration rate stood at approximately negative 0.70 per 1,000 population as of 2024, indicating continued modest net emigration, primarily historically linked to labor migration toward the United States.
Frequently Asked Questions
1. Is Mexico’s population still young?
Yes, relatively. Mexico’s working-age population (15-64) made up 68.6 percent of the total as of 2024 estimates, with the 65-and-over share still comparatively modest at 8.2 percent, though the median age has risen substantially in recent decades.
2. Why is Mexico’s fertility rate falling?
Mexico’s fertility decline reflects the classic demographic transition pattern, including urbanization, expanded education, improved contraceptive access, and rising female labor force participation, with an additional sharp pandemic-linked drop of 22 percent in 2020 alone.
3. When will Mexico become an aging country?
Mexico’s 65-and-over share, at 8.2 percent as of 2024, remains well below the levels seen in aging economies like Japan or Italy; the country is currently within its demographic dividend window, with more pronounced aging expected in coming decades as current working-age cohorts grow older.
4. Is Mexico’s demographic dividend ending?
Not yet. Population Pyramids’ 2025 analysis characterizes Mexico as currently within an optimal demographic dividend window, with a favorable 48.4 dependency ratio, though this window is typically understood to last 20 to 30 years before working-age cohorts begin aging into retirement.
5. What is Mexico’s current population?
Mexico’s population was estimated at 131,946,900 in 2025, based on figures compiled from national and international demographic sources.
6. How does Mexico’s fertility compare with the United States?
Mexico’s fertility rate fell below that of the United States for the first time in 2020, a historic reversal after decades in which Mexican fertility had consistently exceeded the US rate.
7. What is Mexico’s life expectancy?
Mexico’s life expectancy was estimated at approximately 75.1 to 75.3 years as of 2023, with INEGI, UN, and World Bank estimates converging closely around this figure, though at least one state, Campeche, has seen life expectancy decline in recent years, linked to cartel-related violence.
8. Is Mexico losing population to migration?
Mexico’s net migration rate stood at approximately negative 0.70 per 1,000 population as of 2024, indicating modestly more emigration than immigration, though at a considerably lower magnitude than in earlier decades of Mexican migration history.
9. How has Mexico’s age structure changed?
Mexico’s median age has risen by 12.7 years according to recent demographic analysis, while the under-15 population share fell to 23.3 percent by 2024, down from close to half the population under 25 as recently as 2009.
10. Does Mexico benefit from an aging China?
Some demographic analysis frames Mexico’s relatively younger, cost-competitive workforce as a comparative advantage for manufacturing nearshoring as China’s own working-age population contracts, though this reflects an economic interpretation of demographic trends rather than a projection from official sources.
Sources
- Wikipedia, “Demographics of Mexico,” citing CIA World Factbook and national census data
- United Nations Population Fund (UNFPA), Mexico Population 2025 country data page
- UNFPA, Mexico Demographic Dividend Data
- Our World in Data, “Mexico – Population and Demography Country Profile,” citing UN World Population Prospects
- Wikipedia, “List of Mexican states by life expectancy,” citing INEGI, UN, World Bank, and WHO estimates
- PopulationPyramids.org, “Mexico Population Pyramid 2025”
