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Grant County, WI
22 cities and towns and 21 ZIP codes in Grant County, Wisconsin.
Population
51,770
Land area
1,148sq mi
People per sq mi
45
ZIP codes
21
Cities and towns in Grant County
Grant County at a glance
- Grant County is 59% less dense than Wisconsin as a whole.
- Households here earn a median of $66,858 a year, 14% less than the Wisconsin figure of $77,485.
- A typical owner-occupied home is valued at $200,700 (25% below Wisconsin) and median rent is $813 a month.
- The biggest population centers are Platteville (11,499), Lancaster (3,976) and Boscobel (3,242).
Local data for Grant County, WI
Counts from official public data
Housing and community stats
Grant County, WI, American Community Survey 2020-2024
Median household income
$66,858
Poverty rate
13.0%
Median home value
$200,700
Prices +3.6% in a year
Median rent
$813/mo
Homeownership
69.8%
Bachelor's or higher
25.6%
Median age
36.8
Average commute
21.1 min
Largest reported origins and ancestries: German Americans (20,948), Irish Americans (6,959), Norwegian Americans (2,902).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
2.8%
Sep 2026, +0.1 pts in a year
Average annual pay
$49,231
17,152 jobs, 2025
Income per person
$54,345
BEA, 2024
Federal spending
$319M
FY 2026, $6,138 per person
PPP loans
$94.7M
3,167 loans, 12,511 jobs reported
Campaign donations
$141K
Itemized, 2026 cycle
How people get to work
Grant County, WI, workers 16 and older. American Community Survey 5-year estimates
- Drove alone75.5%
- Carpooled5.5%
- Public transit0.3%
- Walked6.4%
- Bicycle0.4%
- Taxi, ride-hailing, motorcycle or other1.6%
- Worked from home10.3%
Average one-way commute: 21.1 minutes for people who do not work from home.
Environment and hazard risk
Grant County, WI, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: landslide
Storm events since 1996
889
Most often thunderstorm wind
Flood insurance policies
64
0.4% of homes, county
July high / Jan low
81° / 9°F
38.5 inches of rain a year
Hazards, floods and storm historyCheck a flood zone24 historic places
Health statistics
Share of adults in Grant County, WI, CDC PLACES estimates
Obesity
40.9%
U.S. 33.3% +7.6 pts
Diabetes
11.5%
U.S. 12.1% -0.6 pts
Smoking
15.0%
U.S. 12.8% +2.2 pts
Uninsured (18-64)
8.2%
U.S. 11.1% -2.9 pts
Cities, towns and ZIP codes in Grant County
Population shown
Frequently asked questions
- What is the largest city in Grant County, WI?
- Platteville is the largest city or town in Grant County, with about 11,499 residents.
- How many ZIP codes are in Grant County?
- Grant County includes 21 ZIP Code Tabulation Areas, including 53554, 53569, 53573, 53801, 53802.
- What is the population of Grant County, WI?
- About 51,770 people live in Grant County, based on American Community Survey 5-year estimates.
- What counties border Grant County?
- Grant County borders Dubuque County, IA, Iowa County, Jo Daviess County, IL, Richland County, Clayton County, IA, Lafayette County, Crawford County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023