Lake Koshkonong, WI ZIP Codes
2 ZIP codes serve Lake Koshkonong, Wisconsin: 53538 and 53534. Together they are home to 31,054 residents in 12,768 households. That is more than the 1,010 people counted inside Lake Koshkonong Census-designated place, because these ZIP codes reach past its boundary. Median household income ranges from $82,783 in 53538 to $89,045 in 53534.
Lake Koshkonong Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 1,010 |
| Households | 498 |
| Median household income | $97,115 |
| Median home value | $370,300 |
| Median age | 54 |
| Median rent | $1,296 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 31,054 |
| Households (sum of ZIP codes) | 12,768 |
| Median household income, range across ZIP codes | $82,783 (53538) to $89,045 (53534) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $85,141 |
| Homeowners | 75.7% |
| Households with kids under 18 | 26.3% |
| Moved in the past year | 10.2% |
| Carrier routes in EDDM2GO's route library | 24 routes, 14,300 homes (2 of 2 ZIP codes) |
Top facts
- Highest median household income in Lake Koshkonong: 53534 ($89,045)
- Most residents: 53538 (18,813 people)
- Highest homeownership: 53534 (78.1% own their home)
- Most households with kids: 53534 (32.0% of households)
- Most new movers: 53534 (12.7% moved in last year)
- Youngest median age: 53534 (40.1 years)
- Highest median home value: 53534 ($294,900)
Every ZIP code in Lake Koshkonong
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 53538 | Fort Atkinson | 18,813 | 7,960 | $82,783 | $245,900 | 74.3% | 22.8% | 8.5% | 14 | 8,558 | 12% of its land |
| 53534 | Edgerton | 12,241 | 4,808 | $89,045 | $294,900 | 78.1% | 32.0% | 12.7% | 10 | 6,387 | 2% of its land |
A ZIP code is listed for Lake Koshkonong when at least 10% of its land lies inside the Lake Koshkonong Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Lake Koshkonong. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Lake Koshkonong.
Counties
- Jefferson County — 14 ZIP codes
- Rock County — 15 ZIP codes
Nearby cities sharing these ZIP codes
- Fort Atkinson — 1 ZIP code
- Edgerton — 1 ZIP code
Price a mailing to Lake Koshkonong ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Lake Koshkonong, WI?
- 53538 and 53534. A ZIP code is listed for Lake Koshkonong when at least 10% of its land lies inside the Lake Koshkonong Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Lake Koshkonong.
- What is the population of Lake Koshkonong, WI?
- The Census Bureau counts 1,010 residents inside Lake Koshkonong Census-designated place (ACS 2020–2024). The 2 ZIP codes that serve Lake Koshkonong hold 31,054 residents in all.
- What is the median household income in Lake Koshkonong, WI?
- $97,115 inside Lake Koshkonong Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $82,783 to $89,045.
- Which Lake Koshkonong ZIP code has the highest median household income?
- 53534, at $89,045, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Lake Koshkonong, WI?
- For the 2 of 2 ZIP codes in EDDM2GO's stored route library: 24 carrier routes reaching 14,300 residential and 644 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.