Columbia County

Columbia County
Town of Lodi, Columbia County; Photographer: Dan Kempel
County Seat: Portage
Address:

400 DeWitt St.

City: Portage
Zip: 53901
Phone: 608-742-2191
Land Area: 773.9 sq. miles
Water Area: 33 sq. miles
Elevation: 800 ft. at Portage; 1,247 ft. at Gibraltar Rock; 1,404 ft. at Owen Memorial Park
Number of Lakes: 56
Area in Lakes: 3,095 acres (4.84 sq. miles)
Rivers: Wisconsin, Fox, Crawfish
Major Watershed: Wisconsin River (Northwest); Rock River (Southeast); Fox River (North)
Geographical Province: North and West: Central Plain; South and East: Eastern Ridges and Lowlands
Vegetation:

Mostly oak savanna, with small areas of sedge meadow. South-central: Prairie bluestem and composites.

Population:

1930: 30,503
1970: 40,150
1980: 43,222
1990: 45,088
2000: 52,468
2010: 56,833

WCA District: Southern