2020 County Boundary (Census/TIGER)

This is the 2020 vintage of the 2020 TIGER/Line county boundary. This layer is identical to the 2010 one. Date: 1/21/2021 Update: Update: Irregular. While Census boundaries are updated every 10 years, the Census Bureau makes annual corrections to the geographies as needed. These updates are usually minor and BMC reviews them every few years. Source: Census TIGER/Line. More information on Census geography can be found at https://www.census.gov/geo/maps-data/data/tiger-line.html.