Median age of population

The American population has been aging at a very consistent pace. From 1990 to 2017, the median age of the population declined only twice: once from 35.5 years in 1999 to 35.4 years in 2000 and again from 36.9 years in 2008 to 36.8 years in 2009. The relatively smooth uptick in the median age is driven by the net increases in the size of the elderly population, lifespans and total population. Moreover, the end of World War II resulted in a demographic bulge of individuals born between 1940 and 1965, which has reshaped society as it has aged. In recent years, this group began crossing the threshold into senior adulthood (65 years and older).

As baby boomers near and surpass retirement age, the median age of the population has been inching upward. In addition to the large influx of newborns 60 years ago, the size of this demographic group has been sustained by medical advancements. Coupled with superior nutrition and improved safety features in many aspects of life, Americans live longer than ever. Simultaneously, the birth rate in the US has seen a consistent slump over the last decade, as this had contributed to a rising median population age. With the COVID-19 pandemic in 2020, the median age scaled down by 0.8% in response to the risks posed by the virus at the time, which put most of the population at risk because of the lack of available vaccines in the year. Older populations were the most at risk from the virus in the year, so the median age shifted downwards for the first time since 2001. But, with the deployment of the vaccine in the latter half of the year and into 2021, the median age grew 1.6% as more people, especially older populations, got vaccinated. In 2022, the median age rose 0.5% as such factors as vaccination rates from the previous year helped prevent older individuals from losing their lives to COVID-19, along with the presence of boosters that were also made available in the year that provided additional protections for older adults. As concerns surrounding the pandemic fade while the presence of medical treatments, the median age of the population rose, as older individuals live for longer.