Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/WI/COUNTY/GRANT

Grant County, WI ZIP codes

There are 22 ZIP codes in Grant County, WI, in 22 towns, from 53554 to 53827. The largest are 53818 (Platteville), 53813 (Lancaster) and 53805 (Boscobel).

The county seat is Lancaster.

ZIP codes
22
Towns
22
County seat
Lancaster
County FIPS
55043
Population
51,770
Median household income
$66,858
Land area
1,148 sq mi
Area code
608
Metro area
Platteville

Grant County ZIP codes by town

Lancaster (county seat)
53813

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Grant County ZIP codes

53554535695357353801538025380453805538065380753808538095381053811538125381353816538175381853820538245382553827

The ZIP codes of Grant County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Grant County in numbers

About 51,770 people live in Grant County, in 19,960 households, the 28th most populous of Wisconsin's 72 counties. The median household income is $66,858 a year, 14% below the Wisconsin median of $77,485 (US: $80,734). The median owner-occupied home is valued at $200,700 (25% below the Wisconsin median), and median gross rent is $813 a month. The median age is 36.8; 25.6% of adults 25 and over hold a bachelor's degree or higher (33.4% across Wisconsin); the average commute takes 21 minutes.

Population51,770Grant51,770
Households19,960Grant19,960
Median age36.8Grant36.8Wisconsin40.2US 38.9
Median household income$66,858Grant$66,858Wisconsin$77,485US $80,734
Median home value$200,700Grant$200,700Wisconsin$266,500US $332,700
Median gross rent$813Grant$813Wisconsin$1,087US $1,413
Bachelor's degree or higher25.6%Grant25.6%Wisconsin33.4%US 35.7%
Mean commute21.1 minGrant21.1 minWisconsin22.2 minUS 26.4 min
Population density45 / sq miGrant45 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Grant County

Largest towns in Grant County
TownZIP codesPopulation
Platteville 1 11,499
Lancaster 1 3,976
Boscobel 1 3,242
Fennimore 1 2,752
Cuba City 1 2,007
Hazel Green 1 1,204
Muscoda 1 1,151
Dickeyville 1 878
Bloomington 1 710
Cassville 1 634
Montfort 1 629
Potosi 1 595
Livingston 1 555
Kieler 1 358
Stitzer 1 358

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Grant County.

Not sure you are in Grant County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Grant County, with figures

ZIP codes in Grant County
ZIP City Type Population Median income Median home
53554 Livingston , WI Standard 1,029 $74,063 $175,000
53569 Montfort , WI Standard 978 $89,500 $207,100
53573 Muscoda , WI Standard 2,906 $64,776 $182,200
53801 Bagley , WI Standard 998 $65,357 $135,100
53802 Beetown , WI Standard 132 $80,417 $169,600
53804 Bloomington , WI Standard 1,275 $82,917 $165,800
53805 Boscobel , WI Standard 5,554 $60,870 $164,100
53806 Cassville , WI Standard 1,514 $64,076 $164,600
53807 Cuba City , WI Standard 4,209 $77,887 $225,500
53808 Dickeyville , WI Standard 905 $70,913 $193,400
53809 Fennimore , WI Standard 4,748 $65,568 $192,500
53810 Glen Haven , WI Standard 389 $75,500 $167,500
53811 Hazel Green , WI Standard 3,093 $82,769 $224,700
53812 Kieler , WI Standard 254 $80,833 $199,200
53813 Lancaster , WI Standard 6,222 $84,004 $220,400
53816 Mount Hope , WI Standard 856 $71,250 $201,100
53817 Patch Grove , WI Standard 227 $48,958 $150,300
53818 Platteville , WI Standard 16,024 $55,567 $236,700
53820 Potosi , WI Standard 2,467 $77,083 $201,900
53824 Sinsinawa , WI No street area — — —
53825 Stitzer , WI Standard 358 $102,500 $170,800
53827 Woodman , WI Standard 429 $81,607 $163,200

Cite this page

zipcodes.pro. “Grant County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/wi/county/grant

Underlying data is public domain or openly licensed — sources, vintages and licences.