Wisconsin · Census place 5583925

Waterloo, Wisconsin

Waterloo is a city in Jefferson County, Wisconsin with an estimated 3,611 residents on July 1, 2024. It is the 191st largest of 370 incorporated places of 1,000+ people in the state.

Population 2024: 3,611; #191 of 370 in Wisconsin
Change since 2020: +3.3%; +115 people
Land area: 3.8 sq mi; + 0.07 sq mi water
Density: 953 / sq mi; State median 1,583

Orange pin: Waterloo. Shaded: its county. Dark pin: Madison.

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Tools and pages that start from Waterloo

Waterloo population, 2020 to 2024

Waterloo added 115 residents from July 2020 to July 2024, a change of +3.3%. In the latest year it moved by -2.

July 1 estimates. The April 2020 estimates base was 3,496. The axis starts above zero so yearly changes are visible.

Waterloo covers 3.79 square miles of land and 0.07 of water, for 953 people per square mile of land. The median Wisconsin place of 5,000+ has 1,583, so Waterloo is less dense than the typical town.

What county Waterloo is in

All of Waterloo's residents live in Jefferson County, which had 86,245 residents in 2024. Waterloo holds 4.2% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Waterloo

1 ZIP Code Tabulation Area (ZCTA) overlaps Waterloo by at least 10% of the ZCTA's or the city's land: 53594. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Waterloo is

The Census internal point of Waterloo is at 43.183500, -88.990000. Madison, the capital, is 21.2 miles WSW in a straight line. The nearest larger place is Marshall, WI (3,753 people), 3.8 miles away. The nearest city of 100,000 or more is Madison, WI, 23.1 miles away.

Internal point

Decimal: 43.183500, -88.990000
DMS: 43°11'0.60"N 88°59'24.00"W
UTM: 16N 338279.8E 4783114.8N
Geohash: dp8twvr6n
Plus code: 86MH52M5+CX

Daylight in Waterloo

At 43.18° N, Waterloo gets about 15 h 23 min of daylight around the June solstice and 8 h 59 min around the December solstice, a swing of 6 h 24 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Waterloo

The eight nearest incorporated places of 1,000+ in Wisconsin, measured between internal points. The closest is Marshall, 3.8 miles away, with 3,753 people.

Questions people ask

What is the population of Waterloo, WI?

3,611 on July 1, 2024, in the Census Vintage 2024 estimates. That is up 115 (3.3%) from 3,496 in July 2020.

What county is Waterloo in?

Jefferson County. All of its residents live in that county.

What ZIP codes cover Waterloo?

1 ZIP Code Tabulation Area overlaps it by at least 10% of either area: 53594.

How far is Waterloo from Madison?

21.2 miles (34.2 km) in a straight line, heading WSW from Waterloo.

What is the nearest larger city to Waterloo?

Marshall, WI, with 3,753 residents, 3.8 miles away between internal points.

Sources and data as of

Data as of: Census Vintage 2024 subcounty estimates (July 1, 2024), 2024 Gazetteer places, 2020 ZCTA to place relationship file.

How every number is computed: methodology. Spotted a wrong figure? Report an error.