From the U.S. Census:
The U.S. population 65 and older is now the largest in terms of size and percent of the population, compared with any previous census, according to a new 2010 Census brief released today from the U.S. Census Bureau on the nation’s older population. The group grew at a faster rate than the total population between 2000 and 2010.
According to the 2010 Census, there were 40.3 million people 65 and older on April 1, 2010, increasing by 5.3 million since the 2000 Census when this population numbered 35.0 million. The percentage of the population 65 and older also increased during the previous decade. In 2010, the older population represented 13.0 percent of the total population, an increase from 12.4 percent in 2000.
Direct to Full Text of Census Brief:
You can also access a summary of the brief in this U.S. Census news release.
See Also: Compilation of Other 2010 Census Briefs