Oskaloosa ZIP Code List — Jefferson County, KS

There is one unique ZIP code in Oskaloosa, Kansas and it is 66066. Area code: 785.

ZIP codes

77.22

sq mi land

1.66

sq mi water

785

area code

Oskaloosa, KS ZIP code map

About Oskaloosa, KS

Oskaloosa, Kansas, is a small but vibrant city located within Jefferson County. It is known for its rich history and community-oriented atmosphere. This city offers a unique blend of rural charm and access to modern amenities, making it an appealing place for both residents and visitors.

Location & geography

Situated in the northeastern part of Kansas, Oskaloosa is surrounded by picturesque landscapes including rolling hills and agricultural fields. It is approximately 15 miles from the city of Lawrence to the east and around 30 miles from Topeka, the state capital, to the southwest. The total area of Oskaloosa encompasses 77.22 square miles of land and includes 1.66 square miles of water, contributing to its scenic beauty.

Community & economy

The city of Oskaloosa is characterized by its welcoming residents and a strong sense of community. It primarily relies on agriculture and light manufacturing as key industries, providing local jobs and economic stability. Daily life in Oskaloosa is marked by community events, outdoor activities, and a close-knit environment that fosters lifelong friendships.

Transportation

Oskaloosa is accessible via several highways, including U.S. Route 24 and Kansas Highway 92, which connect it to neighboring towns and cities. The nearest major airport is in Topeka, offering regional flights, while local transit options are limited, primarily serving residents within the city. For broader travel, many residents utilize personal vehicles to commute to nearby urban areas.

History

Oskaloosa was founded in the mid-19th century and has roots that trace back to early settlers attracted to the fertile land. Over the years, the city has seen the development of various key industries, including agriculture and small businesses that enhance its economic landscape. A notable event in its history is the establishment of local landmarks that commemorate the city’s heritage and its evolution over time.

Did you know?

One surprising fact about Oskaloosa is that it has the distinction of being the only city in Jefferson County with its own ZIP code, 66066. Additionally, its name is derived from a Native American term, adding a unique layer to its cultural history.

ZIP codes for Oskaloosa, KS (1)

ZIP code	City	County	Map
66066	Oskaloosa	Jefferson	View map

Demographics & statistics

2,803

Population

36.7

Median age

$74,356

Median household income

$48,508

Per capita income

$214,000

Median home value

$836

Median monthly rent

89.3%

Home ownership

5.7%

Poverty rate

4.0%

Unemployment

1,087

Housing units

19.2%

Bachelor's or higher

Age distribution

Male Female

Under 5

138

5–9

113

10–14

15–19

20–24

315

25–34

259

185

35–44

152

189

45–54

155

124

55–59

102

103

60–64

134

65–74

111

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	567	20.2%
18 and over	2,236	79.8%
65 and over	383	13.7%
Median age	36.7 years

Race & ethnicity

White 88.9%

Two or more races 5.9%

Hispanic or Latino 4%

Other race 0.6%

American Indian / Alaska Native 0.4%

Asian 0.1%

Group	Count	%
White	2,596	88.9%
Two or more races	173	5.9%
Hispanic or Latino	118	4%
Other race	18	0.6%
American Indian / Alaska Native	11	0.4%
Asian	4	0.1%

Household income

Under $10k 0.1%

$10k–$15k 3.7%

$15k–$25k 4.7%

$25k–$35k 8.2%

$35k–$50k 7.2%

$50k–$75k 29.7%

$75k–$100k 3.6%

$100k–$150k 32.4%

$150k–$200k 4.7%

$200k+ 5.6%

Range	% of households
Under $10k	0.1%
$10k–$15k	3.7%
$15k–$25k	4.7%
$25k–$35k	8.2%
$35k–$50k	7.2%
$50k–$75k	29.7%
$75k–$100k	3.6%
$100k–$150k	32.4%
$150k–$200k	4.7%
$200k+	5.6%
Median income	$74,356

Housing

Home values

Under $50k 1.5%

$50k–$100k 15.5%

$100k–$150k 11.5%

$150k–$200k 16.0%

$200k–$300k 26.5%

$300k–$500k 25.3%

$500k–$1M 3.8%

Housing overview

Metric	Value
Median home value	$214,000
Median rent / month	$836
Owner occupied	89.3%
Renter occupied	10.7%
Vacant	4.4%
Single-family detached	85.9%
Large apartment buildings	0.0%
Mobile homes	9.1%
Median rooms	6.3
Avg household size (owned)	2.42

Year built

Era	%
2020 or later	0.0%
2010–2019	3.6%
2000–2009	22.2%
1990–1999	8.6%
1980–1989	9.7%
1970–1979	24.0%
1960–1969	9.9%
1950–1959	4.0%
1940–1949	1.7%
1939 or earlier	16.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	3.3%
2 bedrooms	27.1%
3 bedrooms	43.4%
4 bedrooms	23.7%
5+ bedrooms	1.7%

Vehicles per household

Vehicles	% of households
No vehicle	3.5%
1 vehicle	17.4%
2 vehicles	39.9%
3 or more	39.2%

Heating fuel

Fuel type	%
Utility gas	31.1%
Electricity	13.6%
Propane / LP gas	37.9%
Wood	7.9%

Households & families

Household type	Count	%
Married-couple family	679	58.6%
Cohabiting couple	105	9.1%
Male householder, no spouse	197	17.0%
Female householder, no spouse	177	15.3%
Households with children under 18	311	26.9%
Households with seniors (65+)	251	21.7%
Average household size	2.37

Marital status

Status	Male	Female
Never married	29.4%	11.8%
Married	54.5%	55.9%
Separated	0.1%	0.5%
Widowed	4.0%	15.5%
Divorced	11.9%	16.4%

Education

Less than 9th grade 0.2%

Some HS, no diploma 2.3%

HS graduate 39.9%

Some college, no degree 27.1%

Associate's degree 11.2%

Bachelor's degree 11.8%

Graduate / professional 7.4%

Metric	%
HS diploma or higher	97.5%
Bachelor's or higher	19.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	30	6.2%
Kindergarten	138	28.6%
Elementary school	179	37.1%
High school	98	20.3%
College / grad school	37	7.7%

Employment

Industry of employment

Construction 20.8%

Education & healthcare 18.7%

Professional & management 11.4%

Transportation & utilities 8.2%

Manufacturing 6.9%

Finance & real estate 6.2%

Retail trade 6.1%

Arts, food & hospitality 5.7%

Other services 5.2%

Public administration 4.4%

Agriculture & mining 2.6%

Information 2.2%

Wholesale trade 1.6%

Occupation

Category	%
Management, business & arts	38.1%
Service	11.6%
Sales & office	13.6%
Natural resources & construction	25.5%
Production & transportation	11.1%

Employment type

Type	%
Private sector	77.0%
Government	13.9%
Self-employed	9.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	74.5%
Carpool	13.1%
Public transit	0.0%
Walk	2.4%
Other means	0.4%
Avg commute (minutes)	30.8

Poverty

All people 5.7%

Under 18 years 12.9%

18 and over 3.8%

Married-couple families 3.1%

Female-led households 0.0%

Income support

Source	% of households
Social Security	26.6%
Retirement income	17.7%
Supplemental Security	3.2%
Cash public assistance	1.4%
Food stamps / SNAP	5.2%

Health indicators

Condition	%
High blood pressure	36.1%
High cholesterol	35.9%
Heart disease	7.2%
Stroke	3.2%
Asthma	9.5%
Arthritis	27.5%
Kidney disease	3.0%
Pulmonary disease	7.3%
Cancer	7.4%

Behavior / access	%
Binge drinking	16.8%
No physical activity	24.8%
Less than 7 hrs sleep	31.2%
Fair or poor health	13.9%
Poor mental health	13.6%
Poor physical health	10.4%
No health insurance	13.6%
Visited doctor (checkup)	74.2%
Visited dentist	63.7%
Cholesterol screening	89.4%
Teeth loss	14.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	155	6.9%

Disability	%
Any disability	13.0%
Under 18	2.8%
18–64 years	8.9%
65 and over	50.6%

Health insurance coverage

Type	%
Private insurance	82.9%
Public insurance	27.5%
Uninsured under 19	2.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,677	95.5%
Spanish	17	0.6%
Other Indo-European	2	0.1%
Asian & Pacific Islander	5	0.2%
Other languages	10	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,796	99.8%
Born in same state	2,792	99.6%
Born in different state	1,943	69.3%
Foreign born	4	0.1%
Naturalized citizen	7	0.2%
Not a US citizen	3	42.9%

Ancestry

Ancestry	Count	%
French	394	14.1%
Italian	278	9.9%
Arab	127	4.5%
Irish	20	0.7%

Ancestry	Count	%
Dutch	16	0.6%
English	15	0.5%
German	10	0.4%
Polish	5	0.2%

Technology access

Metric	% of households
Computer access	41.3%
Internet access	96.7%

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

Frequently asked questions

What is the ZIP code for Oskaloosa, KS?

Oskaloosa, KS has one ZIP code: 66066.

What is the main ZIP code for Oskaloosa, KS?

The primary ZIP code for Oskaloosa, KS is 66066. The city uses area code 785 for phone service.

What county is Oskaloosa, KS in?

Oskaloosa is located in Jefferson County, Kansas.

How many ZIP codes are in Oskaloosa, KS?

Oskaloosa, KS has 1 ZIP code.

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

Downtown Oskaloosa and its main business district are located in ZIP code 66066, which serves as the central commercial area of this Jefferson County city.

What ZIP code should I use for mailing addresses to Oskaloosa High School and other city institutions?

Oskaloosa High School and other city institutions in Oskaloosa are all served by ZIP code 66066, the single ZIP code that covers the entire city.