American FactFinder
DISCLAIMER: "The Census Bureau stopped releasing new data in American FactFinder (AFF) at the end of June 2019 and transitioned to data.census.gov for data releases formerly on AFF. AFF will remain as an archive system for data and functionality that are not yet available in data.census.gov until early 2020." (Ask.census.gov)
Find population, housing, economic, and geographic data (US, states, counties, cities, towns, 5-digit ZIP Codes, census tract, Congressional district).
View the 2010 Census Summary File 1 for detailed data on age, sex, households, families, the population in group quarters, and housing units. Also included are counts for many race and Hispanic or Latino categories. Data will be released on a state by state basis.