US Counties

Downloaded from ourgridfuture.org, Horizon Climate Group, 2025. Modified from shapefiles originally from US Census Bureau, 2018 and 2022. Suggested citation below.

Elizabeth Abramson, Horizon Climate Group, Adapted 2018 Cartographic Boundary Files, based on US Census Bureau, April 2025, ourgridfuture.org.

Additional information:
This layer was created by Horizon Climate Group based on the sources listed below. Horizon Climate Group modified the US Census Bureau's 2018 Cartographic Boundary Shapefile by replacing the counties in Connecticut with the updated county names and extents present in the 2022 TIGER/Line Shapefile. Horizon Climate Group modified the 2022 Connecticut counties to adhere to the overall state boundary in the 2018 file.

US Census Bureau, Cartographic Boundary Files - Shapefile, cb_2018_us_county_500k.zip, 2018, https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html.

US Census Bureau, Geography Division, 2022 TIGER/Line Shapefiles: Counties (and equivalent)(2020), September 30, 2022, https://www.census.gov/cgi-bin/geo/shapefiles/index.php?year=2020&layergroup=Counties+%28and+equivalent%29.