Oskaloosa ZIP Code List — Mahaska County, IA

There is one unique ZIP code in Oskaloosa, Iowa and it is 52577. Area code: 641.

ZIP codes

158.35

sq mi land

1.54

sq mi water

641

area code

Oskaloosa, IA ZIP code map

About Oskaloosa, IA

Oskaloosa is a charming city located in the heart of Iowa, specifically in Mahaska County. Known for its rich history and vibrant community, Oskaloosa offers a unique blend of rural charm and urban amenities. Its picturesque landscapes and friendly atmosphere make it an inviting place for both residents and visitors alike.

Location & geography

Oskaloosa is situated approximately 45 miles southeast of Des Moines and is bordered by charming small towns and expansive farmlands. The city encompasses a land area of 158.35 square miles, with an additional 1.54 square miles of water area contributing to its scenic beauty. The terrain is primarily flat with some rolling hills, providing a pleasant environment for outdoor activities.

Community & economy

The character of Oskaloosa is defined by its strong sense of community and engagement among its residents. The local economy is supported by various industries, including agriculture, manufacturing, and retail, providing diverse job opportunities. Daily life in Oskaloosa often revolves around community events, local businesses, and access to recreational facilities, fostering a close-knit community spirit.

Transportation

Oskaloosa is well-connected through various transportation routes, including U.S. Highway 63, which runs north-south, and U.S. Highway 92, easing access to surrounding areas. The nearest major airport is Des Moines International Airport, located about 50 miles away, facilitating air travel. Public transportation options may be limited, making personal vehicles the primary mode of transit.

History

Oskaloosa was founded in 1843 and has a storied past that reflects the broader development of Mahaska County and central Iowa. Originally an agricultural center, Oskaloosa has evolved to encompass various industries over the years, contributing to its growth as a regional hub. Notable events in its history include the foundation of the Iowa State Bank and the impact of railroad expansion in the late 19th century.

Did you know?

One surprising fact about Oskaloosa is that it hosts the annual Mahaska County Fair, a popular event that attracts visitors from across the region. Additionally, the city is home to William Penn University, a private institution that adds to the educational landscape and cultural vibrancy of the area.

ZIP codes for Oskaloosa, IA (1)

ZIP code	City	County	Map
52577	Oskaloosa	Mahaska	View map

Demographics & statistics

14,437

Population

38.5

Median age

$63,961

Median household income

$34,101

Per capita income

$138,200

Median home value

$817

Median monthly rent

64.1%

Home ownership

14.6%

Poverty rate

4.2%

Unemployment

4,202

Housing units

24.2%

Bachelor's or higher

Age distribution

Male Female

481

Under 5

476

438

5–9

434

555

10–14

551

488

15–19

484

522

20–24

518

830

25–34

822

845

35–44

838

761

45–54

755

434

55–59

431

435

60–64

432

813

65–74

806

427

75–84

423

220

85+

218

← Male

Female →

Age summary

Group	Count	%
Under 18	3,459	24.0%
18 and over	10,978	76.0%
65 and over	2,907	20.1%
Median age	38.5 years

Race & ethnicity

White 92.2%

Two or more races 2.6%

Black or African American 2%

Asian 1.4%

Hispanic or Latino 0.9%

Other race 0.7%

American Indian / Alaska Native 0.2%

Group	Count	%
White	13,439	92.2%
Two or more races	386	2.6%
Black or African American	293	2%
Asian	197	1.4%
Hispanic or Latino	135	0.9%
Other race	98	0.7%
American Indian / Alaska Native	23	0.2%

Household income

Under $10k 4.1%

$10k–$15k 5.1%

$15k–$25k 12.3%

$25k–$35k 6.5%

$35k–$50k 12.4%

$50k–$75k 18.3%

$75k–$100k 16.1%

$100k–$150k 15.8%

$150k–$200k 5.6%

$200k+ 3.9%

Range	% of households
Under $10k	4.1%
$10k–$15k	5.1%
$15k–$25k	12.3%
$25k–$35k	6.5%
$35k–$50k	12.4%
$50k–$75k	18.3%
$75k–$100k	16.1%
$100k–$150k	15.8%
$150k–$200k	5.6%
$200k+	3.9%
Median income	$63,961

Housing

Home values

Under $50k 9.8%

$50k–$100k 22.3%

$100k–$150k 22.1%

$150k–$200k 13.2%

$200k–$300k 23.0%

$300k–$500k 7.3%

$500k–$1M 2.3%

Housing overview

Metric	Value
Median home value	$138,200
Median rent / month	$817
Owner occupied	64.1%
Renter occupied	35.9%
Vacant	8.6%
Single-family detached	75.0%
Large apartment buildings	2.4%
Mobile homes	6.0%
Median rooms	5.7
Avg household size (owned)	2.49

Year built

Era	%
2020 or later	0.1%
2010–2019	5.2%
2000–2009	9.4%
1990–1999	9.3%
1980–1989	7.4%
1970–1979	15.7%
1960–1969	6.5%
1950–1959	12.4%
1940–1949	4.4%
1939 or earlier	29.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.5%
1 bedroom	7.2%
2 bedrooms	37.1%
3 bedrooms	38.0%
4 bedrooms	13.2%
5+ bedrooms	4.0%

Vehicles per household

Vehicles	% of households
No vehicle	5.9%
1 vehicle	28.8%
2 vehicles	39.1%
3 or more	26.2%

Heating fuel

Fuel type	%
Utility gas	59.8%
Electricity	28.2%
Propane / LP gas	9.2%
Fuel oil	0.2%
Wood	1.5%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	2,755	48.2%
Cohabiting couple	496	8.7%
Male householder, no spouse	1,057	18.5%
Female householder, no spouse	1,404	24.6%
Households with children under 18	1,710	29.9%
Households with seniors (65+)	1,866	32.7%
Average household size	2.40

Marital status

Status	Male	Female
Never married	34.8%	25.5%
Married	50.8%	49.8%
Separated	1.1%	0.9%
Widowed	2.7%	11.6%
Divorced	10.7%	12.2%

Education

Less than 9th grade 2.6%

Some HS, no diploma 5.0%

HS graduate 37.5%

Some college, no degree 20.1%

Associate's degree 10.5%

Bachelor's degree 17.6%

Graduate / professional 6.6%

Metric	%
HS diploma or higher	92.3%
Bachelor's or higher	24.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	383	10.4%
Kindergarten	89	2.4%
Elementary school	1,601	43.6%
High school	689	18.7%
College / grad school	914	24.9%

Employment

Industry of employment

Manufacturing 30.1%

Education & healthcare 20.5%

Retail trade 10.7%

Arts, food & hospitality 6.9%

Construction 6.3%

Other services 5.9%

Professional & management 4.2%

Agriculture & mining 3.9%

Transportation & utilities 3.9%

Finance & real estate 3.0%

Public administration 1.8%

Wholesale trade 1.6%

Information 1.1%

Occupation

Category	%
Management, business & arts	36.8%
Service	15.8%
Sales & office	15.8%
Natural resources & construction	8.3%
Production & transportation	23.3%

Employment type

Type	%
Private sector	82.7%
Government	9.9%
Self-employed	7.3%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	80.0%
Carpool	7.8%
Public transit	0.1%
Walk	6.0%
Other means	0.6%
Avg commute (minutes)	15.8

Poverty

All people 14.6%

Under 18 years 16.7%

18 and over 14.0%

Married-couple families 4.0%

Female-led households 25.3%

Income support

Source	% of households
Social Security	33.3%
Retirement income	24.3%
Supplemental Security	5.5%
Cash public assistance	4.3%
Food stamps / SNAP	15.4%

Health indicators

Condition	%
High blood pressure	33.9%
High cholesterol	32.6%
Heart disease	7.2%
Stroke	3.4%
Asthma	9.7%
Arthritis	25.1%
Kidney disease	3.1%
Pulmonary disease	7.5%
Cancer	7.1%

Behavior / access	%
Binge drinking	20.1%
No physical activity	26.5%
Less than 7 hrs sleep	31.8%
Fair or poor health	14.3%
Poor mental health	14.3%
Poor physical health	10.4%
No health insurance	10.0%
Visited doctor (checkup)	75.0%
Visited dentist	64.6%
Cholesterol screening	86.4%
Teeth loss	15.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	622	5.7%

Disability	%
Any disability	14.3%
Under 18	6.9%
18–64 years	11.1%
65 and over	33.6%

Health insurance coverage

Type	%
Private insurance	67.7%
Public insurance	42.7%
Uninsured under 19	2.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	13,480	93.4%
Spanish	169	1.3%
Other Indo-European	25	0.2%
Asian & Pacific Islander	11	0.1%
Other languages	132	1.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	14,138	97.9%
Born in same state	13,992	96.9%
Born in different state	10,901	75.5%
Foreign born	146	1.0%
Naturalized citizen	299	2.1%
Not a US citizen	153	51.2%

Ancestry

Ancestry	Count	%
French	1,925	13.3%
Italian	1,690	11.7%
English	1,587	11%
Arab	1,054	7.3%

Ancestry	Count	%
Polish	354	2.5%
Dutch	77	0.5%
Irish	55	0.4%

Technology access

Metric	% of households
Computer access	39.6%
Internet access	92.9%

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

Frequently asked questions

What is the ZIP code for Oskaloosa, IA?

Oskaloosa, IA has one ZIP code: 52577.

What is the main ZIP code for Oskaloosa, IA?

The primary ZIP code for Oskaloosa, IA is 52577. The city uses area code 641 for phone service.

What county is Oskaloosa, IA in?

Oskaloosa is located in Mahaska County, Iowa.

How many ZIP codes are in Oskaloosa, IA?

Oskaloosa, IA has 1 ZIP code.

What ZIP code covers the William Penn University campus area in Oskaloosa?

William Penn University, located in downtown Oskaloosa, is served by ZIP code 52577, which covers the main campus and surrounding academic district.

What is the ZIP code for downtown Oskaloosa's main business district?

The downtown Oskaloosa business district, centered around the historic A Street corridor, is located within ZIP code 52577.