Lake Koshkonong vs Sullivan

A side-by-side comparison of Lake Koshkonong and Sullivan: population, income, housing, and more.

Lake Koshkonong and Sullivan are places in Wisconsin. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Lake Koshkonong has the higher population (983 vs 711 in Sullivan). Lake Koshkonong has the higher median household income ($93,125 vs $82,500 in Sullivan). Lake Koshkonong has the higher median home value ($334,300 vs $244,500 in Sullivan).

Population, income & housing

	Lake Koshkonong	Sullivan
Population	983	711
Median age	56.6 yrs	40.5 yrs
Median household income	$93,125	$82,500
Median home value	$334,300	$244,500
Median gross rent	$1,167	$1,055
Housing units	738	276
Homeownership rate	90.0%	47.1%
Bachelor's degree or higher	28.6%	19.8%
Unemployment rate	2.5%	1.3%

Trends (ACS 5-year, 2019–2023)

	Lake Koshkonong	Sullivan
Population	1,135 → 983 (-13.4%)	686 → 711 (+3.6%)
Median household income	$75,893 → $93,125 (+22.7%)	$59,375 → $82,500 (+38.9%)
Median home value	$264,800 → $334,300 (+26.2%)	$183,300 → $244,500 (+33.4%)
Median gross rent	$890 → $1,167 (+31.1%)	$857 → $1,055 (+23.1%)

Lake Koshkonong

Population

1,135983

Median household income

$75,893$93,125

Median home value

$264,800$334,300

Median gross rent

$890$1,167

Sullivan

Population

686711

Median household income

$59,375$82,500

Median home value

$183,300$244,500

Median gross rent

$857$1,055

Age & race/ethnicity

Age distribution (share)

	Lake Koshkonong	Sullivan
Under 5	0.5%	4.1%
5 to 17	13.8%	18.7%
18 to 24	3.5%	10.5%
25 to 34	5.4%	10.4%
35 to 44	4.8%	10.8%
45 to 54	19.0%	15.6%
55 to 64	19.3%	15.2%
65 to 74	22.2%	11.3%
75 and over	11.5%	3.4%

Race & ethnicity (share)

	Lake Koshkonong	Sullivan
White (non-Hispanic)	96.7%	97.7%
Black or African American	1.3%	0.0%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.2%	0.4%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.2%	0.1%
Two or more races	1.2%	0.7%
Hispanic or Latino	0.3%	1.0%

Educational attainment (age 25+)

Share of adults 25+

	Lake Koshkonong	Sullivan
No high school diploma	6.1%	5.9%
High school graduate	31.9%	36.9%
Some college or associate's	33.4%	37.3%
Bachelor's degree	20.7%	16.5%
Graduate or professional degree	7.9%	3.4%

Commute to work

How workers get to work (share)

	Lake Koshkonong	Sullivan
Drove alone	75.7%	76.1%
Carpooled	8.5%	2.7%
Public transit	0.0%	0.0%
Walked	0.0%	5.5%
Bicycle	0.0%	0.0%
Worked from home	15.9%	15.1%
Other means	0.0%	0.5%

Housing

Units in structure (share)

	Lake Koshkonong	Sullivan
1-unit, detached	94.9%	51.4%
1-unit, attached	3.8%	3.6%
2 to 4 units	1.4%	19.9%
5 to 19 units	0.0%	18.5%
20 or more units	0.0%	6.5%
Mobile home & other	0.0%	0.0%

Poverty & households

	Lake Koshkonong	Sullivan
Poverty rate	6.0%	23.0%
Average household size	2.09	2.59
Mean commute (minutes)	27	26
Median year structure built	1962	1976