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What stage of life is 90 years old?: The nonagenarian experience

According to the U.S. Census Bureau, the population of Americans aged 90 and older has nearly tripled over the last three decades, with that trend expected to continue. So, **what stage of life is 90 years old?** It's a complex and unique period known as the "oldest-old" or nonagenarian stage, marked by both increased longevity and evolving health and social needs.