• March: Census forms are mailed nationwide.
• April 1: The effective date for responses. Forms are to be mailed back after this date. Online responses are not permitted.
• April to July: Census takers visit households that did not mail back information.
• December: U.S. Census Bureau officially reports state population figures that affect congressional apportionment.
• March 2011: States receive local data from Census Bureau that guides congressional redistricting.
Source: U.S. Census Bureau