Projections for Life Expectancy in South Korea
Back in February 2017, a team led by Majid Ezzati, a global environmental health professor at Imperial College London, released a paper in The Lancet forecasting future life expectancy for 35 developed nations. Collaborating with the World Health Organization, they employed a fresh statistical technique called Bayesian model ensemble, which combines outputs from 21 different forecasting models. This approach aimed to provide projections that are more reliable compared to those derived from any single model alone. The findings, which drew considerable international media attention, suggested that South Korean women born in 2030 might have an average life expectancy of around 90.8 years, positioning them to be the first national group in recorded history to surpass the 90-year average.
However, this number isn’t set in stone. The paper indicated there’s a 57 percent likelihood that average female life expectancy in South Korea would exceed 90 by 2030, alongside a 90 percent chance it would surpass 86.7 years—the highest recorded figure for female life expectancy up until 2012. Thus, while the crossing of the 90-year mark appears probable, it’s not a certitude. South Korea is projected to be the pioneering nation to approach this threshold, with its female life expectancy notably surpassing those of other countries in the analysis, including Japan, long regarded as a leader in longevity at a forecasted 88.4 years, and France, estimated at 88.6 years.
Factors Behind South Korea’s Longevity
What’s behind South Korea’s remarkable increase in life expectancy over the decades? The reasons aren’t particularly exotic. They consist of a recognizable mixture of overall economic progress, access to healthcare, and population health behaviors, applied fairly uniformly across different socioeconomic strata. As outlined in a press release from EurekAlert accompanying the Lancet study, the significant factors include enhanced childhood nutrition, extensive healthcare availability via the National Health Insurance Service, which has mainly covered the population since the late 1980s, relatively low obesity rates compared to other industrialized nations, lower average blood pressure when compared to Western counterparts, and a broad, equitable distribution of these health improvements across various classes.
This emphasis on equity significantly sets South Korea apart from the United States in the same projections. Both countries are affluent democracies with advanced healthcare systems. However, by 2030, the U.S. is expected to lag, with life expectancies of 83.3 years for women and 79.5 years for men, ranking near the bottom of the analyzed group. Ezzati and his team identified obesity, high mortality rates for mothers and infants, uneven healthcare access, and elevated crime rates as the key components hindering U.S. progress. In contrast, South Korea has effectively spread its health advancements throughout the population, while the U.S. benefits mostly its more affluent citizens, allowing others to lag behind. This difference is reflected in the overall statistics.
Changes from 1985 to 2030
The transition in South Korean longevity is astonishingly rapid when viewed through a historical lens. According to the World Economic Forum, South Korean women born in 2030 will, on average, live 6.6 years longer than those born in 2010—the largest anticipated increase among the studied nations. In 1985, the life expectancy for South Korean females was just 73.4 years; by 2010, that rose to 84.2 years, with projections adding another 6.6 years by 2030. Overall, that represents a gain of about 17 years in average life expectancy within a single generation.
The nature of these improvements has evolved over time. Earlier decades saw reductions in mortality from infectious diseases, especially among children, as South Korea made considerable investments in maternal and child health, vaccination initiatives, and public health infrastructure. More recent years, however, have shifted focus to delaying deaths from chronic diseases such as heart issues, strokes, and cancer. Historically, the earlier transition is something many countries have undergone. The latter transition, currently lifting longevity across nearly all developed nations, is being achieved more swiftly and equitably in South Korea compared to most.
The Significance of the 90-Year Mark
Throughout much of the 20th century, experts viewed the 90-year threshold as almost a biological limit on national life expectancy averages. This perception stemmed from two sources: historical evidence, as no population had approached 90 years, and theoretical assumptions regarding human lifespan constraints. Ezzati highlighted that “many researchers believed life expectancy would never surpass 90 years” as recently as the early 2000s. The 2017 study aimed to challenge this notion, finding that the 90-year barrier could actually be exceeded within a generation.
The potential implications for healthcare, retirement, and social policy were significant. A population where women live to an average of 90 years has a fundamentally different demographic landscape compared to one where they live to 80, influencing the proportion of older individuals, retirement spans, healthcare demands, and intergenerational economic dynamics. Ezzati’s team noted that responding to rising longevity might require investments in healthy aging and potential shifts in retirement ages. South Korea, already grappling with its aging population and low fertility rates before the 2017 prediction, has continued to address these demographic challenges since then.
Recent Developments
The 2017 study based its forecasts on data from 2010 with an eye toward 2030. Fast forward to 2026, and we are about four years away from these projections. Recent data from the World Health Organization indicates that South Korean female life expectancy was around 86.7 years in 2024—already the highest globally as of 2012. While the COVID-19 pandemic caused a slight temporary decline in life expectancy across many nations, South Korea managed the situation relatively well, resulting in a modest dip. Whether the 90-year projection will be reached exactly by 2030, or slightly before or after, hinges on ongoing trends in chronic disease among elderly women in South Korea that remain challenging to predict.
The broader insights of the Lancet study have mostly held true post-publication. South Korea maintains its status as the likely first nation to breach the 90-year average for female life expectancy. Countries like France, Japan, Spain, and Switzerland also remain close, projecting upper 80s figures. Meanwhile, the United States continues to fall behind in lifespan improvements, with deepening internal disparities and issues like the opioid crisis aggravating its situation. The fundamental findings by Ezzati—that widespread socioeconomic equity and healthcare access can significantly impact longevity—have been supported by trends observed since 2017. The once seemingly unreachable 90-year threshold is now just a few years away from being realized.
