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1. U.S. Counties, 2017

2010. TomTom North America, Inc., Esri, and U.S. Department of Commerce, Census Bureau. U.S. Counties represents the counties of the United States in the 50 states, the District of Columbia, and Puerto Rico. Esri.

2. U.S. County Boundaries, 2015

2010. TomTom North America, Inc. and Esri. U.S. County Boundaries represents the boundary lines of the counties and county equivalents of the United States. Esri.