This website is gradually replacing American Factfinder as the main site for Census data.

Support for users of census data.

A suite of services that provide selected demographic and economic data from the Census Bureau tailored to specific types of users.

This tool lets you look up an address to find its GeoID, along with its census block and tract numbers.

A portal for data from the Census and American Community Survey.

Use this site to get graphs and data about places, occupations, education or industries.

Provides access to summary tables and time series of population, housing, agriculture, and economic data, along with GIS-compatible boundary files, from 1790 forward, for all levels of U.S. census geography, including states, counties, tracts, and blocks.

LibGuide from the University of Missouri Columbia that "Provides free summary (aggregate) data from the US Census Bureau from 1790 to the present..." (website)

Provides actionable data for economic developers to use.

A service whose purpose is to enhance awareness of and access to public data, especially Census Bureau products.

Provides census data for African Americans in selected areas in Missouri from the years 1880, 1900, and 1920.

Block tract as well as voting precinct tract maps.