The first release of 2010 Census data shows the United States population increased 9.7% in a decade to 308.745,538. The House of Representatives districts are based on Census data and the political maps are changed as a result of the new numbers.

The most populous state was California (37,253,956); the least populous, Wyoming (563,626). The state that gained the most numerically since the 2000 Census was Texas (up 4,293,741 to 25,145,561) and the state that gained the most as a percentage of its 2000 Census count was Nevada (up 35.1% to 2,700,551).

Regionally, the South and the West picked up the bulk of the population increase, 14,318,924 and 8,747,621, respectively. But the Northeast and the Midwest also grew: 1,722,862 and 2,534,225.

Additionally, Puerto Rico's resident population was 3,725,789, a 2.2 percent decrease over the number counted a decade earlier.

While Nevada grew 35.1% in population, Michigan declined 0.6%. This is the slowest population percentage growth since 1940.

The press is already calculating out the redistricting of the House of Representatives. Bloomberg has Texas gaining 4 House seats with Ohio and New York both losing 2 seats in the House of Representatives. California remains unchanged.

18 states lost or gained congressional districts. Texas, as expected, gained the most seats, moving from 32 to 36 seats. Florida was the only other state to gain multiple seats, adding two and bringing it to 27 seats.