Latin America's Rapidly Aging Population Surpasses the World

A Rapid Demographic Shift in Latin America

Latin America is undergoing one of the most profound demographic changes in recent history. This transformation is marked by a declining birthrate and an aging population, which is reshaping the region's social and economic landscape. Countries like Uruguay are at the forefront of this shift, with fertility rates falling well below the replacement level needed to maintain a stable population.

In 2023, the total fertility rate in Uruguay dropped to 1.27 children per woman, and projections indicate it could fall further to 1.20 by the end of the year. This is significantly below the replacement level of 2.1 children per woman, which is necessary to sustain a population without immigration. The country’s population, which reached its peak at 3.51 million in 2020, is expected to decline steadily, reaching around 3 million by 2070. By that time, more than 32% of residents will be over the age of 65, while only 11.5% will be under 15.

Uruguay is not alone in this trend. Across Latin America, populations are aging rapidly. While the region is not the oldest globally—Europe and East Asia have higher proportions of elderly individuals—it is aging faster than any other part of the world. According to the United Nations Population Division, Latin America is projected to transition from a young to an aging society within less than 40 years, a shift that took Europe over a century.

In countries such as Chile, Brazil, and Argentina, more than 15% of the population is now over 65, and the median age exceeds 32. This rapid change is linked to a long-term decline in fertility, which currently averages 1.8 children per woman. Several factors contribute to this decline, including improved access to education, increased female participation in the workforce, urbanization, and evolving family values.

One key factor has been the sharp drop in teenage pregnancies. For many years, teenage fertility accounted for a significant share of total births in several Latin American countries. However, over the past decade, this rate has declined sharply. Helena Cruz Castanheira, a demographer at the Latin American and Caribbean Demographic Center, noted that the decline happened faster than anticipated.

In Uruguay, the use of free subdermal contraceptive implants between 2016 and 2018 contributed to one-third of the decline in teen fertility. Similar trends are observed in other countries. In Colombia, for example, 2024 saw the lowest number of births ever recorded, with only 3,159 births to teenage mothers.

Although the average age of first sexual activity has remained stable or even declined in some countries, the increase in access to and use of contraceptives has played a crucial role. This is partly due to public policies focused on sexual and reproductive health. Despite these advances, Latin America and the Caribbean still have the second-highest rate of teenage fertility in the world, with 52 births per 1,000 women aged 15 to 19 in 2022, compared to a global average of 39.

Each year, more than 1.6 million girls and teens in the region become mothers, often facing challenges such as poverty, sexual abuse, and limited access to education and employment. These conditions reinforce intergenerational inequality and limit future opportunities.

Cruz emphasized that the goal of demographic policy should be to ensure that women can have the number of children they want, when they choose to. Unplanned teenage pregnancies are associated with difficult life paths for young mothers, highlighting the need for continued investment in sexual health, family planning, and education.

A report from Austral University in Argentina suggests that only Ecuador, Paraguay, Mexico, and Peru currently show a more favorable outlook, with a larger share of youth under 15, indicating greater long-term productive potential. In contrast, the population aged 65 and older has grown steadily across the region, reaching or surpassing 15% in several countries.

As the population ages, there are fewer working-age people for each retiree, posing significant challenges for social, health, pension, and elder care systems. Uruguay serves as a warning: aging is happening faster than expected. Without adjustments to these policies, the economic and social consequences could be severe.