54421 ZIP Code — Colby, WI

Clark County, Wisconsin

ZIP code 54421 is located in Colby, Wisconsin, within Clark County. It covers approximately 69.89 square miles and serves a population of 3,831 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 715.

About ZIP code 54421

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $161,800. Owner-occupancy sits near the national average at 74%.

Median household income is $59,783. 35% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is production, transportation, and material moving, with manufacturing as the leading industry. The average commute of 19 minutes is near the national average.

College attainment at 13% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (22%) compared to national benchmarks. 20% of residents lack health insurance, above the national average.

Overall, ZIP code 54421 reflects a community defined by a trades-oriented workforce and a significant Social Security-dependent population.

3,831

population

69.89

sq mi land

Standard

ZIP type

Central (CT)

timezone

54421 ZIP code map

Cities in ZIP code 54421

Below are the cities the US Postal Service accepts for ZIP code 54421. Using any city not on this list may result in mail delivery delays.

City	Status
Colby	Preferred

Nearby ZIP codes

54405 Abbotsford (5.1 mi) 54488 Unity (5.2 mi) 54425 Dorchester (7.6 mi) 54422 Curtiss (9.5 mi) 54479 Spencer (10.6 mi) 54480 Stetsonville (10.6 mi) 54426 Edgar (12.5 mi) 54484 Stratford (12.6 mi) 54446 Loyal (13 mi) 54460 Owen (13.5 mi) 54404 Marshfield (17.1 mi) 54498 Withee (18.3 mi)

Demographics updated 05/2026

Population
Total population	3,831
Population density	55 / sq mi
State FIPS	55
County FIPS	019

Geography
Land area	69.89 sq mi
Water area	0.12 sq mi
Latitude	44.9016
Longitude	-90.2870
Timezone	Central (CT)
Area code	715

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	45.4%	44.8%	39.4%
$50k – $100k	35.8%	36.5%	33.0%
$100k – $200k	14.9%	16.3%	22.4%
Over $200k	3.8%	2.4%	5.2%

Demographics & statistics

3,831

Population

People per sq mi

36.4

Median age

$59,783

Median household income

$27,644

Per capita income

$161,800

Median home value

$783

Median monthly rent

73.6%

Home ownership

14.3%

Poverty rate

2.6%

Unemployment

991

Housing units

12.6%

Bachelor's or higher

Age distribution

Male Female

149

Under 5

135

150

5–9

135

182

10–14

165

183

15–19

165

114

20–24

103

197

25–34

178

259

35–44

233

175

45–54

158

136

55–59

123

112

60–64

101

192

65–74

174

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,133	29.6%
18 and over	2,698	70.4%
65 and over	678	17.7%
Median age	36.4 years

Race & ethnicity

White 80.5%

Hispanic or Latino 8.5%

Two or more races 6.7%

Other race 3.4%

Asian 0.6%

Black or African American 0.1%

American Indian / Alaska Native 0.1%

Group	Count	%
White	3,369	80.5%
Hispanic or Latino	354	8.5%
Two or more races	282	6.7%
Other race	143	3.4%
Asian	27	0.6%
Black or African American	6	0.1%
American Indian / Alaska Native	4	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	45.4%	44.8%	39.4%
$50k – $100k	35.8%	36.5%	33.0%
$100k – $200k	14.9%	16.3%	22.4%
Over $200k	3.8%	2.4%	5.2%

Under $10k 4.2%

$10k–$15k 3.8%

$15k–$25k 10.1%

$25k–$35k 10.8%

$35k–$50k 11.9%

$50k–$75k 18.8%

$75k–$100k 11.7%

$100k–$150k 18.7%

$150k–$200k 5.4%

$200k+ 4.6%

Range	% of households
Under $10k	4.2%
$10k–$15k	3.8%
$15k–$25k	10.1%
$25k–$35k	10.8%
$35k–$50k	11.9%
$50k–$75k	18.8%
$75k–$100k	11.7%
$100k–$150k	18.7%
$150k–$200k	5.4%
$200k+	4.6%
Median income	$59,783

Housing

Home values

Under $50k 4.7%

$50k–$100k 12.7%

$100k–$150k 25.6%

$150k–$200k 24.5%

$200k–$300k 20.5%

$300k–$500k 7.9%

$500k–$1M 2.8%

$1M+ 1.2%

Housing overview

Metric	Value
Median home value	$161,800
Median rent / month	$783
Owner occupied	73.6%
Renter occupied	26.4%
Vacant	5.3%
Single-family detached	76.0%
Large apartment buildings	4.5%
Mobile homes	3.1%
Median rooms	6.1
Avg household size (owned)	3.07

Year built

Era	%
2020 or later	0.3%
2010–2019	3.8%
2000–2009	8.5%
1990–1999	13.8%
1980–1989	7.0%
1970–1979	18.2%
1960–1969	3.9%
1950–1959	9.5%
1940–1949	4.9%
1939 or earlier	30.1%

Bedrooms

Size	% of units
No bedroom (studio)	3.1%
1 bedroom	5.7%
2 bedrooms	23.6%
3 bedrooms	38.7%
4 bedrooms	21.2%
5+ bedrooms	7.8%

Vehicles per household

Vehicles	% of households
No vehicle	6.9%
1 vehicle	25.3%
2 vehicles	36.7%
3 or more	31.0%

Heating fuel

Fuel type	%
Utility gas	49.0%
Electricity	15.3%
Propane / LP gas	20.8%
Fuel oil	4.4%
Wood	9.2%
No fuel used	0.8%

Households & families

Household type	Count	%
Married-couple family	605	48.3%
Cohabiting couple	177	14.1%
Male householder, no spouse	188	15.0%
Female householder, no spouse	282	22.5%
Households with children under 18	489	39.1%
Households with seniors (65+)	374	29.9%
Average household size	2.95

Marital status

Status	Male	Female
Never married	39.6%	26.3%
Married	46.5%	44.3%
Separated	0.5%	0.7%
Widowed	1.7%	10.7%
Divorced	11.7%	17.9%

Education

Less than 9th grade 12.1%

Some HS, no diploma 8.9%

HS graduate 43.1%

Some college, no degree 14.9%

Associate's degree 8.4%

Bachelor's degree 9.7%

Graduate / professional 2.9%

Metric	%
HS diploma or higher	79.0%
Bachelor's or higher	12.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	34	3.6%
Kindergarten	66	7.1%
Elementary school	514	55.0%
High school	207	22.1%
College / grad school	114	12.2%

Employment

Industry of employment

Manufacturing 27.3%

Education & healthcare 17.1%

Retail trade 13.3%

Agriculture & mining 8.6%

Construction 8.2%

Arts, food & hospitality 5.8%

Other services 4.8%

Professional & management 4.1%

Transportation & utilities 3.7%

Finance & real estate 3.6%

Wholesale trade 2.0%

Information 0.7%

Public administration 0.7%

Occupation

Category	%
Management, business & arts	28.3%
Service	12.2%
Sales & office	18.1%
Natural resources & construction	13.0%
Production & transportation	28.4%

Employment type

Type	%
Private sector	81.1%
Government	4.7%
Self-employed	12.8%
Unpaid family workers	1.4%

Commute

Method	%
Drive alone	76.3%
Carpool	6.9%
Public transit	0.0%
Walk	3.9%
Work from home	11.3%
Other means	1.7%
Avg commute (minutes)	18.8

Poverty

All people 14.3%

Under 18 years 16.2%

18 and over 13.5%

Married-couple families 5.1%

Female-led households 20.1%

Income support

Source	% of households
Social Security	34.6%
Retirement income	15.7%
Supplemental Security	4.7%
Cash public assistance	2.8%
Food stamps / SNAP	11.8%

Health indicators

Condition	%
Obesity	36.2%
High blood pressure	32.5%
High cholesterol	33.9%
Diabetes	10.5%
Heart disease	7.5%
Stroke	3.6%
Asthma	10.1%
Arthritis	26.2%
Kidney disease	3.3%
Pulmonary disease	7.9%
Cancer	7.2%

Behavior / access	%
Smoking	21.6%
Binge drinking	23.7%
No physical activity	25.8%
Less than 7 hrs sleep	31.9%
Depression	20.4%
Fair or poor health	15.8%
Poor mental health	14.6%
Poor physical health	11.8%
No health insurance	14.4%
Visited doctor (checkup)	72.9%
Visited dentist	62.4%
Cholesterol screening	84.3%
Teeth loss	17.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	189	7.0%

Disability	%
Any disability	8.4%
Under 18	3.9%
18–64 years	7.5%
65 and over	21.0%

Health insurance coverage

Type	%
Private insurance	59.6%
Public insurance	32.5%
No insurance	20.4%
Uninsured under 19	20.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,547	92.6%
Spanish	350	9.9%
Other Indo-European	251	7.1%
Asian & Pacific Islander	99	2.8%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,526	92.0%
Born in same state	3,471	90.6%
Born in different state	2,803	73.2%
Foreign born	55	1.4%
Naturalized citizen	305	8.0%
Not a US citizen	33	10.8%

Ancestry

Ancestry	Count	%
Italian	196	5.1%
Arab	183	4.8%
Polish	168	4.4%

Ancestry	Count	%
French	51	1.3%
English	41	1.1%
Dutch	32	0.8%

Technology access

Metric	% of households
Computer access	32.7%
Internet access	86.3%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 54421

What city is ZIP code 54421 in?

ZIP code 54421 is primarily assigned to Colby, Wisconsin.

What county is ZIP code 54421 in?

ZIP code 54421 falls within Clark County, Wisconsin.

How educated is the population of ZIP code 54421?

13% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the typical home value in ZIP code 54421?

The median home value in ZIP code 54421 is $161,800.

What is the population of ZIP code 54421?

ZIP code 54421 has an estimated population of 3,831 residents, with a density of 55 people per square mile.

What is the median household income in ZIP code 54421?

The median household income in ZIP code 54421 is $59,783, below the national median of ~$75,000.

What timezone is ZIP code 54421 in?

ZIP code 54421 observes the CST timezone.