Wisconsin · Census place 5516150

Colby, Wisconsin

Colby is a city in 2 counties of Wisconsin with an estimated 1,959 residents on July 1, 2024. It is the 266th largest of 370 incorporated places of 1,000+ people in the state.

Population 2024
1,959
#266 of 370 in Wisconsin
Change since 2020
-1.8%
-36 people
Land area
1.6 sq mi
Density
1,195 / sq mi
State median 1,583
Orange pin: Colby. Shaded: counties it spans. Dark pin: Madison.

Colby population, 2020 to 2024

Colby lost 36 residents from July 2020 to July 2024, a change of -1.8%. In the latest year it moved by -10.

1,99520201,99020211,97820221,96920231,9592024
July 1 estimates. The April 2020 estimates base was 1,996. The axis starts above zero so yearly changes are visible.

Colby covers 1.64 square miles of land, for 1,195 people per square mile of land. The median Wisconsin place of 5,000+ has 1,583, so Colby is less dense than the typical town.

The 2 counties Colby spans

Colby crosses county lines. The Census county-part estimates split its 1,959 residents as follows; Clark County holds 63.9% of them. The shaded shapes are on the map above; dots mark the eight nearest places.

  1. 01Clark County1,252
  2. 02Marathon County707
Residents inside each county, Census Vintage 2024 county-part estimates (SUMLEV 157).

ZIP codes in Colby

1 ZIP Code Tabulation Area (ZCTA) overlaps Colby by at least 10% of the ZCTA's or the city's land: 54421. 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 Colby is

The Census internal point of Colby is at 44.911300, -90.315700. Madison, the capital, is 135.1 miles SSE in a straight line. The nearest larger place is Abbotsford, WI (2,423 people), 2.2 miles away. The nearest city of 100,000 or more is Green Bay, WI, 117.5 miles away.

Internal point

Decimal
44.911300, -90.315700
DMS
44°54'40.68"N 90°18'56.52"W
UTM
15N 711890.4E 4976602.6N
Geohash
9zzz2zf57
Plus code
86PFWM6M+GP

Daylight in Colby

At 44.91° N, Colby gets about 15 h 36 min of daylight around the June solstice and 8 h 47 min around the December solstice, a swing of 6 h 50 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Colby

The eight nearest incorporated places of 1,000+ in Wisconsin, measured between internal points. The closest is Abbotsford, 2.2 miles away, with 2,423 people.

Questions people ask

What is the population of Colby, WI?

1,959 on July 1, 2024, in the Census Vintage 2024 estimates. That is down 36 (1.8%) from 1,995 in July 2020.

What county is Colby in?

It spans 2 counties: Clark County (1,252 residents), Marathon County (707 residents).

What ZIP codes cover Colby?

1 ZIP Code Tabulation Area overlaps it by at least 10% of either area: 54421.

How far is Colby from Madison?

135.1 miles (217.4 km) in a straight line, heading SSE from Colby.

What is the nearest larger city to Colby?

Abbotsford, WI, with 2,423 residents, 2.2 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.

  1. 01Census Vintage 2024 subcounty population estimates
  2. 02Census 2024 Gazetteer, places
  3. 03Census 2020 ZCTA to place relationship file
  4. 04Census 2024 cartographic boundary file, counties (1:5,000,000)

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