| ZIP Codes: | 16 ZIP Codes (11 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Codes: | 262 / 353 / 608 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:14:21 PM |
| Population: | 107,751 [See All] |
| FIPS: | 55127 |
| CBSA: | Whitewater-Elkhorn, WI |
| Land Area: | 591 sq mi |
| Water Area: | 22 sq mi |
| Coordinates: | 42.6229, -88.5167 |
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107,751 residents live across 16 ZIPs covering 591 sq mi, served by 16 distinct USPS-recognized cities.
Population moved from 103,756 to 107,651 from 2014 to 2024 — a +3.8% change. 9 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 53125 (Fontana, $112,500 median) and poorest ZIP 53190 (Whitewater, $66,069) are 19.5 miles apart — a 1.7× income gap across local geography.
Median home values vary 3.0× across this county — from $200,400 in 53585 (Sharon) to $593,800 in 53125 (Fontana).
Density varies 9× across the county — from 65 people/sq mi in 53114 (Darien) to 589 in 53191 (Williams Bay).
Educational attainment ranges from 17.8% bachelor's+ in 53585 (Sharon) to 60.5% in 53125 (Fontana) — the breadth of educational profiles across the area.
Within Wisconsin, this is the #14 most populous of 73 counties and ranks #23 for median household income .
Weighted by population, the typical household earns about $79,961 across the county — reflecting what a typical resident sees, not a simple ZIP average.
32.6% of adults age 25+ hold a bachelor's degree or higher (23,395 of 71,836 reporting).
11 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 53190 | Whitewater | Standard | 20,499 | $66,069 | 134.6 | 5.2% |
| 53147 | Lake Geneva | Standard | 18,638 | $83,566 | 74.1 | 11.2% |
| 53121 | Elkhorn | Standard | 18,551 | $85,643 | 117.6 | -4.0% |
| 53115 | Delavan | Standard | 16,381 | $72,304 | 74.8 | 3.3% |
| 53120 | East Troy | Standard | 10,848 | $96,345 | 59.0 | 10.1% |
| 53128 | Genoa City | Standard | 9,030 | $82,216 | 27.6 | 5.1% |
| 53184 | Walworth | Standard | 4,169 | $84,413 | 31.0 | -4.6% |
| 53191 | Williams Bay | Standard | 3,261 | $75,833 | 5.5 | 11.7% |
| 53585 | Sharon | Standard | 2,264 | $74,779 | 27.5 | 8.7% |
| 53114 | Darien | Standard | 1,979 | $72,708 | 30.6 | -29.3% |
| 53125 | Fontana | Standard | 1,898 | $112,500 | 7.8 | 17.2% |
| 53195 | Zenda | PO Box | 133 | $95,833 | 0.7 | 35.7% |
| 53176 | Springfield | PO Box | 100 | $45,962 | 0.2 | — |
| 53157 | Pell Lake | PO Box | 0 | — | 0.0 | — |
| 53148 | Lyons | PO Box | — | — | 0.0 | — |
| 53138 | Honey Creek | PO Box | — | — | 0.0 | — |