The 2010 decennial census was estimated to cost over $13 billion.
The Census Bureau will be testing online census data collection in upcoming American Community Surveys and plans to offer an online option in the next decennial census in 2020.
The census counts people at their 'usual residence', which is, according to the Census form and website, "where they live and sleep most of the time".
College students should be counted as residents of where they live during the school year, whether it is on their college campus or in a nearby neighborhood, but are often counted twice, both at college and at there permanant residence where their family lives.
College students in dorms are not included in income and poverty data, but are included if they live in non-dormitory or off-campus housing. For this reason, college towns often show very high poverty levels.
Note that data from the ACS are used to make estimates for the greater population. Data are available as follows:
American FactFinder is the US Census Bureau's website to distribute and make available census and survey data. It is a searchable database of data tables containing data from the following census and survey tools.