Lake Koshkonong, WI Profile: Facts, Map & Data


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Lake Koshkonong, Wisconsin - Basic Facts

The Lake Koshkonong Census Designated Place had a population of 1,221 as of July 1, 2017. Lake Koshkonong ranks in the lower quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Wisconsin. See peer rankings below.

The primary coordinate point for Lake Koshkonong is located at latitude 42.8936 and longitude -88.9634 in Jefferson County. The formal boundaries for the Lake Koshkonong Census Designated Place (see map below) encompass a land area of 14.1 sq. miles and a water area of 15.73 sq. miles. Jefferson County is in the Central time zone (GMT -6). The elevation is 781 feet.

The Lake Koshkonong Census Designated Place (GNIS ID: 2393080) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Lake Koshkonong Census Designated Place is located within Town of Sumner, a minor civil division (MCD) of Jefferson County.

Beneath the boundary map are tables with Lake Koshkonong population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Lake Koshkonong Census Designated Place, WI Boundary Map

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Boundary Maps: Town of Sumner | Jefferson County | Wisconsin Counties

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Lake Koshkonong, WI Data & Demographics (As of July 1, 2017)


Total Population 1,221
Daytime Population: Workers 101
Daytime Population: Residents 585
Total Daytime Population (TDP) 686
Ratio TDP/Total Population1 0.56
Population in Households 1,212
Population in Familes 1,007
Population in Group Qrtrs 9
Population Density2 87
Diversity Index3 12


Median Household Income $65,962
Average Household Income $87,273
Per Capita Income $36,218


Total Housing Units 857 (100%)
Owner Occupied HU 472 (55.1%)
Renter Occupied HU 66 ( 7.7%)
Vacant Housing Units 319 (37.2%)
Median Home Value $268,750
Average Home Value $296,835


Total Households 538
Average Household Size 2.25
Family Households 384
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.19% 0.29%
Households 0.34% 0.41%
Families 1.17% 0.31%
Median Household Income   2.69%
Per Capita Income   3.39%

Lake Koshkonong, WI - Peer Comparisons by Rank and Percentile

The table below compares Lake Koshkonong to the other 774 incorporated cities, towns and CDPs in Wisconsin by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 355 54th
Population Density # 741 4th
Diversity Index # 467 39th
Median Household Income # 148 81st
Per Capita Income # 82 90th

Additional comparisons and rankings can be made with a VERY EASY TO USE Wisconsin Census Data Comparison Tool.

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