| ZIP Codes: | 10 ZIP Codes (7 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 353 / 608 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:14:19 PM |
| Population: | 45,937 [See All] |
| FIPS: | 55081 |
| CBSA: | Sparta, WI |
| Land Area: | 1,009 sq mi |
| Water Area: | 13 sq mi |
| Coordinates: | 43.9414, -90.5768 |
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45,937 residents live across 10 ZIPs covering 1,009 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 45,371 to 45,937 from 2014 to 2024 — a +1.2% change. 5 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 54670 (Wilton, $82,250 median) and poorest ZIP 54638 (Kendall, $60,417) are 5.5 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.7× across this county — from $167,800 in 54648 (Norwalk) to $283,300 in 54638 (Kendall).
Density varies 9× across the county — from 10 people/sq mi in 54666 (Warrens) to 92 in 54660 (Tomah).
Educational attainment ranges from 12.3% bachelor's+ in 54670 (Wilton) to 23.4% in 54660 (Tomah) — the breadth of educational profiles across the area.
Within Wisconsin, this is the #31 most populous of 73 counties and ranks #47 for median household income .
Weighted by population, the typical household earns about $68,808 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.5% of adults age 25+ hold a bachelor's degree or higher (6,672 of 31,076 reporting).
7 Standard delivery, 3 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 |
|---|---|---|---|---|---|---|
| 54656 | Sparta | Standard | 18,160 | $72,379 | 268.3 | 4.1% |
| 54660 | Tomah | Standard | 16,124 | $61,186 | 174.3 | -2.4% |
| 54619 | Cashton | Standard | 3,849 | $71,463 | 102.0 | 3.9% |
| 54666 | Warrens | Standard | 2,635 | $78,015 | 270.6 | 3.9% |
| 54670 | Wilton | Standard | 2,048 | $82,250 | 53.3 | -3.6% |
| 54648 | Norwalk | Standard | 1,608 | $74,250 | 75.6 | 3.7% |
| 54638 | Kendall | Standard | 1,513 | $60,417 | 64.8 | 0.7% |
| 54649 | Oakdale | PO Box | — | — | 0.0 | — |
| 54662 | Tunnel City | PO Box | — | — | 0.0 | — |
| 54620 | Cataract | PO Box | — | — | 0.0 | — |