Waterloo is a city in Jefferson County, Wisconsin, United States. The population was 3,628 at the 2020 census. The name Waterloo was suggested by a French resident who was one of Napoleon's soldiers at the Battle of Waterloo. Waterloo is located in the Watertown–Fort Atkinson micropolitan area. The city is the home of Trek Bicycle Corporation.

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

How Waterloo ranks

All →

#25Highest graduation rate in WI #27Most trails in WI #76Most remote workers in WI All WI rankings →

Town numbers

ZIP code53594

Area code920

Living in Waterloo

Housing in Waterloo

$423K Median sale price · Redfin, May 2026

The median sale price was $423,000 in May 2026.

A strong seller's market

Buyer’sBalancedSeller’s

Days on market82

Sale-to-list98.5%

Sold in May7

Zillow Home Value Index · Redfin Data CenterHousing market →

Safety in Waterloo

—

Not graded

A grade needs all of the FBI's latest years (2023–2025). Waterloo's police department reported only 2024 and 2025, so we don't grade it yet. The figures below are still real.

Violent crime per 1,000

Waterloo 0

Wisconsin 2.4

U.S. 3.3

Property crime per 1,000

Waterloo 3.8

Wisconsin 10.3

U.S. 15.5

FBI crime data, 2025 · crimes reported to policeCrime & safety →

Work & commute in Waterloo

Full picture →

Most working residents leave Waterloo for work: only 11% work in town. The top destinations are Madison (9%), Watertown (8%) and Lake Mills (6%). Half commute less than 16 miles.

Madison

Watertown

Lake Mills

Sun Prairie

11%Work in townlive and work in Waterloo 16 miWhere do people commute?the commute map 2,036Jobs based herebalanced

Census LEHD 2023 · ACSWork & commute in Waterloo →

Health in Waterloo

B⁻

Health Grade B−

Healthier than 50% of U.S. towns on seven CDC estimates.

Compared with Wisconsin

1worse than WI

of 32 measures CDC estimates. The other 31 are too close to call.

Conditions all close Habits all close Care 1▼ 6 close Mind all close Everyday needs all close

BetterToo close to callWorse

What stands out

63.4%Fewer adults screened for colon cancerWI 69.4% · worse

Care nearby

Columbus Community HospitalColumbus · 10 mi · ER · rural critical access

Sun Prairie ClinicSun Prairie · 12.3 mi · sliding-scale fees

Primary careNo shortage

DentalNo shortage

Mental healthNo shortage

CDC PLACES 2025 · modeled estimates for adults · CDC's estimate for Waterloo · CMS · HRSAHealth in Waterloo →

Natural hazards in Waterloo

Low

Expected storm and flood damage is higher than in 33% of U.S. communities.

🌊 Inland flooding🌪️ Tornadoes🥶 Cold waves

3Does Waterloo flood?paid flood claims since 2008 4Disasters that paid out herefederal disasters sent FEMA money to Waterloo MapWaterloo vs. its neighborsnearby towns shaded by rating

FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Waterloo →

Climate in Waterloo

Full climate →

Waterloo has cold, snowy winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 11°, and about 42 inches of snow falls in a normal winter.

30° / 14°Winter

57° / 35°Spring

81° / 59°Summer

60° / 39°Fall

How much snow does Waterloo get?About 42 inches a winter.Rain & snow →When is the first frost?Around Oct 9, with the last in spring around Apr 30.Frost dates →Is it warmer than it used to be?+1.1° vs. the 20th century.Then & now →

NOAA U.S. Climate Normals, 1991–2020Climate in Waterloo →

Schools in Waterloo

All Waterloo schools →

C⁺

School Grade C+

The public schools Waterloo’s kids attend, from kindergarten through graduation, trail 65% of Wisconsin’s districts on state tests and graduation. Among towns with similar incomes, they rank near the bottom.

See how Waterloo’s schools compare in WI →

DistrictWaterloo School DistrictSchools6

Waterloo Elementary CElementary · Grades PK–4 · 281 students St. John Evangelical Lutheran SchoolElementary · Grades PK–8 · 102 students Holy Family SchoolElementary · Grades PK–7 · 26 students Waterloo Middle C-Middle · Grades 7–8 · 118 students Waterloo Intermediate C-Middle · Grades 5–6 · 114 students Waterloo High B-High · Grades 9–12 · 232 students

School data from the U.S. Department of Education (NCES, EDFacts). The School Grade is our own summary of state test results and graduation rates, graded within WI. Ratings are from neighbors.