| ZIP Codes: | 23 ZIP Codes (18 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Codes: | 353 / 608 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:55:38 PM |
| Population: | 56,056 [See All] |
| FIPS: | 55043 |
| CBSA: | Platteville, WI |
| Land Area: | 1,438 sq mi |
| Water Area: | 38 sq mi |
| Coordinates: | 42.8576, -90.6938 |
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56,056 residents live across 23 ZIPs covering 1,438 sq mi, served by 23 distinct USPS-recognized cities.
Population moved from 55,311 to 55,802 from 2014 to 2024 — a +0.9% change. 8 ZIPs gained residents, 13 lost.
The county's wealthiest ZIP 53825 (Stitzer, $102,500 median) and poorest ZIP 53818 (Platteville, $55,567) are 12.3 miles apart — a 1.8× income gap across local geography.
Median home values vary 1.8× across this county — from $135,100 in 53801 (Bagley) to $236,700 in 53818 (Platteville).
Density varies 67× across the county — from 10 people/sq mi in 53810 (Glen Haven) to 686 in 53808 (Dickeyville).
Educational attainment ranges from 9.6% bachelor's+ in 53827 (Woodman) to 38.3% in 53818 (Platteville) — the breadth of educational profiles across the area.
Within Wisconsin, this is the #28 most populous of 73 counties and ranks #39 for median household income .
Weighted by population, the typical household earns about $68,107 across the county — reflecting what a typical resident sees, not a simple ZIP average.
25.5% of adults age 25+ hold a bachelor's degree or higher (9,043 of 35,510 reporting).
18 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 53818 | Platteville | Standard | 16,024 | $55,567 | 151.9 | 5.9% |
| 53813 | Lancaster | Standard | 6,222 | $84,004 | 150.8 | 2.2% |
| 53805 | Boscobel | Standard | 5,554 | $60,870 | 135.3 | 1.4% |
| 53809 | Fennimore | Standard | 4,748 | $65,568 | 102.1 | 23.3% |
| 53807 | Cuba City | Standard | 4,209 | $77,887 | 107.8 | -9.6% |
| 53811 | Hazel Green | Standard | 3,093 | $82,769 | 51.3 | -2.6% |
| 53573 | Muscoda | Standard | 2,906 | $64,776 | 105.9 | -8.7% |
| 53820 | Potosi | Standard | 2,467 | $77,083 | 102.0 | -7.5% |
| 53806 | Cassville | Standard | 1,514 | $64,076 | 75.8 | -12.9% |
| 53518 | Blue River | Standard | 1,489 | $62,384 | 85.5 | 19.1% |
| 53804 | Bloomington | Standard | 1,275 | $82,917 | 53.9 | -8.1% |
| 53554 | Livingston | Standard | 1,029 | $74,063 | 41.2 | -13.0% |
| 53801 | Bagley | Standard | 998 | $65,357 | 65.7 | -3.3% |
| 53569 | Montfort | Standard | 978 | $89,500 | 38.5 | -11.8% |
| 53808 | Dickeyville | PO Box | 905 | $70,913 | 1.3 | -10.1% |
| 53816 | Mount Hope | Standard | 856 | $71,250 | 60.0 | -7.7% |
| 53827 | Woodman | Standard | 429 | $81,607 | 39.8 | 95.9% |
| 53810 | Glen Haven | Standard | 389 | $75,500 | 38.0 | -3.0% |
| 53825 | Stitzer | Standard | 358 | $102,500 | 30.3 | -42.8% |
| 53812 | Kieler | PO Box | 254 | $80,833 | 0.7 | — |
| 53817 | Patch Grove | PO Box | 227 | $48,958 | 0.2 | 41.9% |
| 53802 | Beetown | PO Box | 132 | $80,417 | 0.0 | 214.3% |
| 53824 | Sinsinawa | PO Box | — | — | 0.1 | — |