Life Expectancy 2024 United States By Age. According to data from the united nations, the life expectancy at birth in the us worsened by 0.285 years between 2000 and 2021, going from 76.7 years to 76.4 years. For a given year, it represents the average lifespan for a hypothetical.
United nations projections are also included through the year 2100. Life expectancy at birth by state and sex for 2021.