Jo Daviess County, Illinois

Jo Daviess County
Jo Daviess County
County
	Hill terrain in the county, part of the Driftless Area
	Location within the U.S. state of Illinois
	Illinois's location within the U.S.
	Coordinates: 42°22′N 90°13′W / 42.36°N 90.21°W
Country	United States
State	Illinois
Founded	1827
Named for	Joseph Hamilton Daveiss
Seat	Galena
Largest city	Galena
Area
• Total	619 sq mi (1,600 km2)
• Land	601 sq mi (1,560 km2)
• Water	18 sq mi (50 km2) 2.9%
Population (2020)
• Total	22,035
• Estimate (2023)	21,756
• Density	36/sq mi (14/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	16th
Website	www.jodaviesscountyil.gov

Jo Daviess County (/ˈdeɪvɪs/) is the northwesternmost county in the U.S. state of Illinois. According to the 2020 census, it had a population of 22,035.^[1] Its county seat is Galena.^[2] Jo Daviess County is part of the Tri-State Area and is located near Dubuque, Iowa and Platteville, Wisconsin. As part of the Driftless Area, Jo Daviess County contains rugged terrain compared to the rest of the state. Within Jo Daviess County lies Charles Mound, the highest natural point in Illinois, as well as eight of the ten highest points in Illinois.^[3]^[4]

^ "Jo Daviess County, Illinois". United States Census Bureau. Retrieved June 9, 2023.
^ "Find a County". National Association of Counties. Archived from the original on May 3, 2015. Retrieved June 7, 2011.
^ Peak Visor: Jo Daviess County Illinois.
^ Peak Visor: Illinois.

[1] "Jo Daviess County, Illinois". United States Census Bureau. Retrieved June 9, 2023.

[GR6-2] "Find a County". National Association of Counties. Archived from the original on May 3, 2015. Retrieved June 7, 2011.

[3] Peak Visor: Jo Daviess County Illinois.

[4] Peak Visor: Illinois.

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