Bolivia's fertility rate falls to 1.56 children per woman in 2026

Bolivia falls to 1.56 children per woman and is now born below its own size

Bolivia's National Institute of Statistics puts the country's Total Fertility Rate at 1.56 children per woman for 2026. That is the figure the agency published this year in its population estimates and projections, and it leaves the country far below replacement level, the threshold demographers set at around 2.1 children per woman. The drop is no minor adjustment: Bolivia was close to 4.8 children per woman in the mid-1990s and crossed the replacement level around 2019. In just over three decades it lost two thirds of its fertility.

Jesús Fernández-Villaverde, an economist at the University of Pennsylvania who tracks the global decline in birth rates, summed it up with an image hard to forget: "If someone had told me 10 years ago that, by 2026, Bolivia's total fertility rate would be below that of the U.S., I wouldn't have believed it." He added that he would have bet a dollar against a million that it would not happen. The figure, he says, makes him pinch himself.

What does a fertility rate of 1.56 children per woman miccionan?

The Total Fertility Rate measures the average number of children that would be born to a woman if she lived to the end of her childbearing years and, at each fertile age, gave birth according to the average fertility of women that age in the year analyzed. At 1.56, each generation is roughly a quarter smaller than the previous one. The figure does not describe any particular woman, but the aggregate reproductive behavior of an entire country.

To gauge the scale, the replacement rate stands at 2.1 in advanced economies. The math is simple: about 105 boys are born for every 100 girls; in a country with high life expectancy, about 98 of every 100 girls reach the end of their childbearing years. If 1,000 women have 2,100 children, some 1,024 girls are born and about 1,000 survive to repeat the cycle. In developing economies, the threshold can be somewhat higher.

The rule of 85 and Bolivia's population peak

Fernández-Villaverde offers a back-of-the-envelope rule to think about a population ceiling without models: if a country has a life expectancy of 85 years and keeps its annual number of births constant, its long-term population is simply births multiplied by 85. Bolivia's life expectancy is 73.2 years, so that is the multiplier.

The INE projects 153,204 births for 2026. Sustained indefinitely, they would yield a long-term population of 11.2 million people. Bolivia has 11.98 million today. The country is already born below its own size, before counting a single emigrant. Put another way: when the crude birth rate falls below 1,000/73.2, that is, 13.66 per thousand, births are no longer enough to keep the population stable. Bolivia's 2026 rate is 12.77.

Emigration and high-fertility communities: Bolivia's two peculiarities

Bolivia has two elements that are not present, or not to the same degree, in many developed economies. The first is net emigration: more people leave the country than enter, which compounds the effect of low birth rates. The second is the existence, within the country, of communities with fertility rates far above the average.

The most visible case is that of Mennonite families. In the lines for ID cards in Santa Cruz de la Sierra they are recognizable by the checkered shirt, the hat, the floral dress and headscarf, and by a language that is neither Spanish nor any indigenous tongue: Plautdietsch, a Low German their great-grandparents brought from Canada, Mexico or Paraguay. Each couple usually arrives with plenty of children: three in a young family, seven when the parents are around 50.

These communities are not a typical example of the Bolivian family, but they serve to measure the contrast. While the national average sinks, there are groups maintaining fertility well above replacement. The question hanging over the analysis is what happens when part of society reproduces at twentieth-century rates while the majority is already at figures typical of an advanced economy.

What demographic changes are expected if the trend continues

If low fertility rates persist, Bolivia faces a scenario of stagnant or shrinking population, with net emigration as an aggravating factor. The population peak would arrive sooner than demographic inertia would suggest, and from then on the age structure would tilt toward the older brackets.

Bolivia's decline is not an isolated case in the region. Other Latin American countries are recording sharp drops in birth rates, though Bolivia's pace surprised even the specialists who have been documenting the phenomenon for years. The change in magnitude, they note, was very hard to predict for demographers and economists.

The analysis stalls right here: it is known that fertility is falling, it is known that Bolivia is already born below its own size, it is known that emigration subtracts and that there are communities escaping the average. What remains unresolved is how long that cocktail takes to reshape Bolivian society, and whether either of the two peculiarities —emigration or pockets of high fertility— can offset what the majority no longer has.