Lake Mills, WI ZIP code
The ZIP code for Lake Mills, Wisconsin is 53551. It is in Jefferson County.
- Population in these ZIPs
- 9,731
- Avg. median income
- $94,400population-weighted
- Typical home value
- $429,300population-weighted
- Metro area
- Watertown-Fort Atkinson, WI
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Lake Mills, WI ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 53551 | 9,731 | $94,401 | $429,300 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Lake Mills
- Johnson Creek 6 mi
- Waterloo 8 mi
- Cambridge 9 mi
- Deerfield 9 mi
- Jefferson 10 mi
- Marshall 10 mi
- Fort Atkinson 12 mi
- Watertown 13 mi
- Helenville 13 mi
- Cottage Grove 14 mi
- Reeseville 15 mi
- Sullivan 16 mi
Frequently asked questions
What is the ZIP code for Lake Mills, WI?
The ZIP code for Lake Mills, WI is 53551.
What county is Lake Mills, Wisconsin in?
Lake Mills ZIP codes are in Jefferson County.