Census place · GEOID 5541583 · Rock County
Lake Koshkonong, WI ZIP codes
3 ZIP/ZCTAs intersecting this Census place (CDP) in Rock County.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place Lake Koshkonong (GEOID 5541583). Methodology
Combined population of ZIP/ZCTAs intersecting this place: 42,416 (3 ZIPs).
Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology
Map of Lake Koshkonong, WI

ZIP/ZCTA overlap with Lake Koshkonong
Population overlap
Share of each ZIP/ZCTA’s population located within Lake Koshkonong, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting Lake Koshkonong
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 53534 | Edgerton | Rock County | 12,344 | $94,250 |
| 53538 | Fort Atkinson | Jefferson County | 18,604 | $80,784 |
| 53563 | Milton | Rock County | 11,468 | $89,397 |