Adams County GIS Map
Adams is one of the most repeated county names in the United States: there are 12 counties named Adams spread across 12 states. Each one is a different local government with its own boundary, population and flood maps, so the right GIS map depends on which state you mean.
That is also why a search for Adams GIS turns up several unrelated county systems — the name on its own does not tell you which state's mapping office you are after. Pick the state you need below.
Every county page opens an interactive GIS map of that county's official Census boundary, with FEMA flood zones, USGS elevation contours, land cover and school districts you can turn on, plus population, land area and ZIP code data.
Most people searching for Adams County mean Adams County, Colorado — the largest of them, with a population of about 530,225.
All 12 Adams Counties by state
Ordered by population, largest first.
- Adams CountyColorado (CO) 530,225 1,166.8 sq mi
- Adams CountyPennsylvania (PA) 106,115 518.6 sq mi
- Adams CountyIllinois (IL) 64,754 855.2 sq mi
- Adams CountyIndiana (IN) 36,227 338.9 sq mi
- Adams CountyNebraska (NE) 31,052 563.3 sq mi
- Adams CountyMississippi (MS) 28,803 462.3 sq mi
- Adams CountyOhio (OH) 27,540 583.9 sq mi
- Adams CountyWisconsin (WI) 21,123 645.6 sq mi
- Adams CountyWashington (WA) 20,800 1,925 sq mi
- Adams CountyIdaho (ID) 4,744 1,362.8 sq mi
- Adams CountyIowa (IA) 3,622 423.4 sq mi
- Adams CountyNorth Dakota (ND) 2,145 987.5 sq mi