New Interactive Historical census apportionment map released by the US Census Bureau displays apportionment results from 1910-2010. Census 2020 Map Viewer.
Below is a list of the most requested census-related maps. Please be aware that these are based on the 2000 Census. For more info on the 2010 Census check here 
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For Redistricting Information See the Redistricting Site.
Downloadable data such as tracts, blocks, and block groups for the 2010 Census can be found on the Tompkins County Open Data Portal
Old Census Data
- Census 2000 Urban Areas
- Census Tracts 2000
- Population Density 1990
- Population Density 2012 (an interactive app)
- American Community Survey Demographic Data from 2013-2017 Vintage (ESRI Living Atlas, Interactive)