Global Median Age Rises Amid Declining Fertility

The global median age has reached 31 years, reflecting a significant demographic shift as the world population surpasses 8 billion people. According to United Nations Population Division data, the median age has risen from under 21 years in 1976 and is projected to climb to 36 by 2050.

The primary driver of this trend is the decline in the global total fertility rate, which has fallen from approximately five births per woman in the 1960s to 2.2 today. This figure is nearing the replacement rate of 2.1, the threshold required to maintain a stable population without immigration. Currently, more than half of all nations, including the United States, China, and Japan, have fertility rates below this replacement level.

This demographic transition creates structural pressure on pension systems, healthcare services, and labor markets as the proportion of retirees increases relative to the working-age population. While the total global population is expected to peak at approximately 10.3 billion in the mid-2080s, the annual growth rate has consistently declined to below 1 percent. By 2050, the demographic landscape will be defined by a shrinking workforce and a shift in population concentration toward nations such as India, Nigeria, and the Democratic Republic of the Congo.