Map of US Counties

Hawaii County (Hawaiian: Kalana o Hawaiʻi) (officially known as the County of Hawaiʻi) is a county in the U.S. state of Hawaii in the Hawaiian Islands. It is coextensive with the Island of Hawaii, often called the “Big Island” to distinguish it from the state as a whole. The 2020 Census population was 200,629. The ... Read more

Butte County is a rural county located in the U.S. state of Idaho. As of the 2020 census, the population was 2,574, making it the third-least populous county in Idaho. Its county seat and largest city is Arco. The county was established in 1917 from parts of Bingham, Blaine, and Jefferson counties. The county gained ... Read more

Kootenai County (/ˈkuːtniː/ KOOT-nee) is located in the U.S. state of Idaho. In 2020, the United States Census Bureau estimated the county’s population at 171,362, making it the third-most populous county in Idaho and by far the largest in North Idaho, the county accounting for 45.4% of the region’s total population. The county seat and ... Read more

Washington County is a county in the U.S. state of Idaho. As of the 2010 census, the population was 10,198. The county seat and largest city is Weiser, with over half of the county’s population. The county was established in 1879 when Idaho was a territory and named after U.S. President George Washington. Washington County ... Read more

Cook County is the most populous county in the U.S. state of Illinois and the second-most-populous county in the United States, after Los Angeles County, California. More than 40% of all residents of Illinois live within Cook County. As of 2020, the population was 5,275,541. Its county seat is Chicago, the most populous city in ... Read more

Grundy County is a county in the U.S. state of Illinois. According to the 2010 census, it has a population of 50,063. Its county seat is Morris. Grundy County is part of the Chicago-Naperville–Elgin, IL-IN–WI Metropolitan Statistical Area. In 2010, the center of population of Illinois was in Grundy County, just northeast of the village ... Read more

Knox County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 49,967. Its county seat is Galesburg. Knox County comprises the Galesburg, IL Micropolitan Statistical Area. Knox County overview: Name: Knox County FIPS code: 17-095 State: Illinois Founded: 1825 Named for: Henry Knox Seat: Galesburg ... Read more

McHenry County is a county located in the U.S. state of Illinois. According to the 2020 Census, it had a population of 310,229, making it the sixth-most populous county in Illinois. Its county seat is Woodstock. McHenry County is one of the five collar counties of the Chicago-Naperville–Elgin, IL-IN–WI Metropolitan Statistical Area. Long known as ... Read more

Randolph County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 30,163. Its county seat is Chester. Owing to its role in the state’s history, the county motto is “Where Illinois Began.” It contains the historically important village of Kaskaskia, Illinois’s first capital. The ... Read more

Washington County is a county located in the U.S. state of Illinois. As of the 2010 census, it had a population of 14,716. Its county seat is Nashville. It is located in the southern portion of Illinois known locally as “Little Egypt”. Washington County overview: Name: Washington County FIPS code: 17-189 State: Illinois Founded: January ... Read more

Cass County is a county located in the U.S. state of Indiana. As of the 2010 United States Census, its population was 38,966. The county seat is Logansport. Cass County comprises the Logansport, IN Micropolitan Statistical Area. Cass County overview: Name: Cass County FIPS code: 18-017 State: Indiana Founded: 1829 Named for: Lewis Cass Seat: ... Read more

Fulton County is a county located in the U.S. state of Indiana. As of 2010, the population was 20,836. The county seat is Rochester. Fulton County overview: Name: Fulton County FIPS code: 18-049 State: Indiana Founded: 1836 Named for: Robert Fulton Seat: Rochester Largest city: Rochester Total Area: 371.26 sq mi (961.6 km²) Land Area: 368.39 sq mi (954.1 km²) Population ... Read more