These county-based reference maps show and label the census tracts as delineated to support 2010 Census data dissemination. These maps also show the boundaries and names of American Indian areas, Alaska Native areas, Hawaiian home lands, states, counties, county subdivisions, and places. Additionally, these maps display a base feature network including roads, railroads, and water bodies. These features are labeled as map scale permits. Each county is covered by one or more parent map sheets at a single scale. Inset map sheets at larger scales were created where there are clusters of census tracts that cannot be identified at the parent map scale. An index map showing the sheet configuration is included for all counties requiring more than one parent map sheet. The map sheet size is 36 by 32 inches.

Each set of census tract reference maps is accompanied by a Census Tract to Map Sheet relationship file. These semi-colon delimited text files include a record for each census tract within the county, consisting of the code and name of the tract, and a list of all map sheet numbers that the tract appears on.