Median Age of the Foreign-Born Population, for the United States: 1870 to 2011

The native-born population's median age was 35.9 years.

In censuses of 1880, 1890, and 1910 to 1940, published census data on the age and sex distribution of the foreign-born population were limited primarily to the foreign-born White population. During this period, the foreign-born population of races other than White, which peaked at 220,744 in 1930, represented between 1 percent and 2 percent of the total foreign-born population. Because age data for the total foreign-born population are available for 1870, 1900, and 1950 to 1990, and because the foreign-born population of races other than White represented such a small proportion of the total foreign-born population from 1880 to 1940, the population universe for this table is the total foreign-born population. The foreign-born population of races other than White is included in the category "age data not available" for 1880, 1890, and 1910 to 1940.