2010 U.S. Census & Utah
On December 21, 2010, early 2010 census data, including population figures, was released and Utah's population has grown enough since the last census to gain an additional seat in the U.S. House of Representatives, increasing that number to 4. The last time this happened was in 1980, when the number of representatives went from 2 to 3.
Now that Utah will have 4 members in the U.S. House of Representatives, it is up to the Utah State legislature to determine how Utah will be redistricted. A previous proposal for redistricting under a 4-person representative scheme is found on the legislatures' redistricting page.
Census data has been gathered every 10 years in the United States since 1790 under authority of the U.S. Congress. The 1790 Act authorized marshals and their assistants to take a census beginning the first Monday of August in 1790 and gave them 9 months to complete their task. The U.S. Census Bureau has information online about each decennial census taken since 1790 and 2010 census information is available here.