Colby is a city in Clark and Marathon counties in the U.S. state of Wisconsin. It is part of the Wausau, Wisconsin Metropolitan Statistical Area. The population was 1,952 at the 2020 census. Of this, 1,275 were in Clark County, and 677 were in Marathon County. The city is bordered by the Town of Colby, the Town of Hull, and the City of Abbotsford. Colby cheese was first created in Colby.

Official town website ↗

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

Town numbers

ZIP code54421

Area codeSign in to add

Living in Colby

Housing in Colby

$222K▲ 9% in a year Typical home value · Zillow

The typical Colby home is worth about $222,000, up 9% in a year, 35% below the Wisconsin typical home.

Only 2 sales in May 2026, too few for a market read. The typical value is the steadier guide.

Zillow Home Value Index · Redfin Data CenterHousing market →

Schools in Colby

All Colby schools →

C⁺

School Grade C+

The public schools Colby’s kids attend, from kindergarten through graduation, trail 61% of Wisconsin’s districts on state tests and graduation. Among towns with similar incomes, they sit near the middle.

DistrictColby School DistrictSchools5

Colby Elementary C+Elementary · Grades K–5 · 354 students St. Mary SchoolElementary · Grades PK–8 · 83 students Colby Middle C-Middle · Grades 6–8 · 204 students Colby High C-High · Grades 9–12 · 306 students Little Stars Pre-SchoolPrekindergarten · Grades PK · 37 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.

Famous people from ColbyWriters, athletes, leaders and more who were born in Colby.Meet them →