U.S. Census Bureau estimates U.S. population between 306 million and 313 million

U.S. Census Bureau has released the 2010 Demographic Analysis estimates that provide a way of measuring the nation's population. This set of data is independent of the 2010 Census counts. The demographic analysis figures provide national-level estimates of the population by age, sex, two race groups (black and non-black) and for the first time, the Hispanic population under age 20.
Demographic analysis estimates use data on births and deaths, international migration and Medicare enrollment to construct estimates of the population that do not depend upon the results of the 2010 Census. New this year, the Census Bureau is producing five series of estimates to reflect different assumptions about each of the data sources. This is the first time these data are being provided prior to the release of the decennial counts, underscoring their independence from the 2010 Census effort.
Estimates show that Hispanics now represent 21.8%-25% of the population under age 20, which is an increase from 17% in 2000.
“The 2010 Census provides the official population count, but demographic analysis provides an honest presentation of alternative estimates,” said U.S. Census Bureau director Robert Groves.

2010 Demographic Analysis Resident Population Estimates for April 1, 2010
Low: 305.7 million
Middle low: 307.4 million
Middle: 308.5 million
High middle: 310 million
High: 312.7 million