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Lake Koshkonong, WI Demographics & ZIP Codes
Lake Koshkonong, Wisconsin demographics and median household income by ZIP code (in Jefferson County) — 1 ZIP codes — population 18,604 — median income $80,784 — avg. home value $228,200. Compare income, housing, and population across ZIP codes on US5.
Population
18,604
Median household income (avg.)
$80,784
107% of U.S. median
Average home value
$228,200
66% of U.S. median
Average rent
$789
68% of U.S. median
Median age (avg.)
44.0
Lake Koshkonong demographics
Lake Koshkonong, Wisconsin covers 1 ZIP code primarily in Jefferson County, with a combined ZIP-area population of about 18,604.
Across ZIP codes with age data, the average median age is about 44.0 years.
Median household income in Lake Koshkonong
The average median household income across ZIP codes in Lake Koshkonong, Wisconsin is about $80,784 — about 6% above the WI ZIP average ($76,216), and about 7% above the U.S. median ($75,149).
The highest median household income among listed ZIPs is about $80,784 in 53538.
Housing in Lake Koshkonong
For housing in Lake Koshkonong, Wisconsin, the average median home value is about $228,200 and the average median rent is about $789.
The most populous ZIP in this set is 53538 (about 18,604 residents). Use the table below to compare population, income, and home values across codes.
ZIP codes in Lake Koshkonong
Sort by population, income, or home value. Click a column header to toggle ascending / descending.
| ZIP | City | County | State | Population ↓ | Income | Home value |
|---|---|---|---|---|---|---|
| 53538 | Lake Koshkonong | Jefferson County | WI | 18,604 | $80,784 | $228,200 |
Frequently asked questions
What are the demographics of Lake Koshkonong?
Lake Koshkonong, Wisconsin has a combined ZIP-area population of about 18,604 across 1 ZIP codes (primarily Jefferson County). Browse the ZIP table below for population, income, and housing by code.
What is the median household income in Lake Koshkonong?
The average median household income across ZIP codes in Lake Koshkonong, Wisconsin is about $80,784, about 6% above the state ZIP average ($76,216), and about 7% above the U.S. median ($75,149). Average median home value is about $228,200.
How many ZIP codes are in Lake Koshkonong?
Lake Koshkonong, Wisconsin includes 1 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.
Where can I find ZIP code demographics for Lake Koshkonong?
This page lists ZIP codes in Lake Koshkonong, Wisconsin with population, median household income, and home value. Select a ZIP for a full demographics profile.