<P> 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 . </P>
<P> 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 . </P>
what percentage of the united states lives in california
what percentage of the united states lives in california
more than 12 percent
more than 12 percent