County · code 55049
Iowa CountyWisconsin
Iowa County is located in Wisconsin and has its county seat in Dodgeville. The county was formed in 1830 from Crawford County and named after the Iowa people.
- Founded1830
- County seatDodgeville
- Named forIowa people
- Land area763 sq mi + 5.4 sq mi water
- Population23,709 2020 Census
- Parcels mapped31,740 checked 14 October 2026
Where it is
Iowa on the map of Wisconsin
Wisconsin has 72 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1830 from Crawford County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Iowa County was formed in 1830 from Crawford County, and named after Iowa people. Dodgeville is the county seat.
Deeds and plats from before 1830 for land now in Iowa County may have been recorded in Crawford County.
- 1830Iowa County created Iowa created by Michigan Territory from Crawford. · Mich. Terr. Laws, 2:714-715
- 1834
- 1836Became part of Wisconsin Iowa became a county in Wisconsin Territory when Wisconsin Territory was created from Michigan Territory. · Terr. Papers U.S., 27:41-52; U.S. Stat., vol. 5, ch. 54 [1836]/pp. 10-16
- 1836Lost territory Iowa lost to creation of Dane and Portage; Dane not fully organized, attached to Iowa "for judicial purposes." · Wis. Terr. Laws 1836, no. 28, secs. 4, 5, 14/pp. 93-94
- 1848Became part of Wisconsin Iowa became a county in the state of Wisconsin. · U.S. Stat., vol. 9, ch. 89 [1846]/pp. 56-58, and ch. 50 [1848]/pp. 233-235; Van Zandt, 128, 130
Show all 11 changes
- 1830Iowa County created Iowa created by Michigan Territory from Crawford. · Mich. Terr. Laws, 2:714-715
- 1834
- 1836Became part of Wisconsin Iowa became a county in Wisconsin Territory when Wisconsin Territory was created from Michigan Territory. · Terr. Papers U.S., 27:41-52; U.S. Stat., vol. 5, ch. 54 [1836]/pp. 10-16
- 1836Lost territory Iowa lost to creation of Dane and Portage; Dane not fully organized, attached to Iowa "for judicial purposes." · Wis. Terr. Laws 1836, no. 28, secs. 4, 5, 14/pp. 93-94
- 1837
- 1839Changed Dane fully organized, detached from Iowa. · Wis. Terr. Laws 1838-1839, loc. acts, no. 56, secs. 1-2, 9/pp. 128-130
- 1842Changed Richland not fully organized, attached to Iowa "for all county and judicial purposes." · Wis. Terr. Laws 1841-1842, p. 42
- 1846Changed Legislature authorized creation of Lafayette and Montgomery (proposed) from Iowa, dependent upon local referenda and legislative implementation. Lafayette was created 1 May 1847; Montgomery referendum passed, but legislative implementation did not, and the creation of Montgomery did not take place.LafayetteMontgomery· Kellogg, "Organization," 189; Wis. Terr. Laws 1846, pp. 41-43
- 1847Lost territory Iowa lost to creation of Lafayette. · Kellogg, "Organization," 201-202; Wis. Terr. Laws 1846, pp. 41-43; Wis. Terr. Laws 1847, reg. sess., pp. 57-63
- 1848Became part of Wisconsin Iowa became a county in the state of Wisconsin. · U.S. Stat., vol. 9, ch. 89 [1846]/pp. 56-58, and ch. 50 [1848]/pp. 233-235; Van Zandt, 128, 130
- 1850Changed Richland fully organized, detached from Iowa. · Wis. Laws 1850, ch. 92, secs. 1-3/p. 60
Land and parcels
What the maps cover in Iowa
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 31,740 parcels from Wisconsin DOA, Wisconsin Land Information Program, with the State Cartographer's Office (V12 Statewide Parcels). Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 30 June 2026 · checked 14 October 2026 -
Address points Missing
No public address points layer found for Iowa County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Iowa by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Iowa County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Iowa County.
See your own lot on these maps
Open Iowa County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Iowa County
- When was Iowa County founded?
- Iowa County was founded in 1830, formed from Crawford County, and named after Iowa people.
- What is the county seat of Iowa County?
- The county seat of Iowa County is Dodgeville.
- Is there an online parcel map for Iowa County?
- Yes. Wisconsin DOA, Wisconsin Land Information Program, with the State Cartographer's Office (V12 Statewide Parcels) publishes a parcel map of 31,740 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Iowa County's boundary or name changed?
- Iowa County was created in 1830 from Crawford County. Since then the Atlas of Historical County Boundaries records 10 later changes, chiefly involving Dane County, Lafayette County and Richland County.
- Is my lot in a flood zone?
- We do not have flood maps for Iowa County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby