As of 2006, California had an estimated population of 37,172,015, more than 12 percent of the U.S. population. This includes a natural increase since the last census of 1,557,112 people (i.e. 2,781,539 births minus 1,224,427 deaths) and an increase due to net migration of 751,419 people. Immigration resulted in a net increase of 1,415,879 people, and migration from within the U.S. resulted in a net decrease of 564,100 people. California is the 13th fastest - growing state. As of 2008, the total fertility rate was 2.15. The most recent census reports the population of California as 39,144,818.
what percentage of the united states lives in california
more than 12 percent