66066 ZIP Code — Oskaloosa, KS

Jefferson County, Kansas

ZIP code 66066 is located in Oskaloosa, Kansas, within Jefferson County. It covers approximately 77.22 square miles and serves a population of 2,803 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 785.

About ZIP code 66066

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $214,000. Owner-occupancy is high at 89%, well above the national average.

The gap between median ($74,356) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 6% is below the national average.

The dominant occupation class is management, business, and professional, with construction as the leading industry. The average commute of 31 minutes is near the national average.

College attainment at 19% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 66066 reflects a community defined by a trades-oriented workforce and high homeownership.

2,803

population

77.22

sq mi land

Standard

ZIP type

Central (CT)

timezone

66066 ZIP code map

Cities in ZIP code 66066

Below are the cities the US Postal Service accepts for ZIP code 66066. Using any city not on this list may result in mail delivery delays.

City	Status
Oskaloosa	Preferred

Nearby ZIP codes

66070 Ozawkie (5.8 mi) 66073 Perry (7.6 mi) 66054 Mc Louth (8.9 mi) 66097 Winchester (10.4 mi) 66512 Meriden (10.5 mi) 66088 Valley Falls (11.9 mi) 66429 Grantville (12.3 mi) 66044 Lawrence (13.4 mi) 66050 Lecompton (13.8 mi) 66617 Topeka (14.5 mi) 66060 Nortonville (14.8 mi) 66086 Tonganoxie (15.2 mi)

Demographics updated 05/2026

Population
Total population	2,803
Population density	36 / sq mi
State FIPS	20
County FIPS	087

Geography
Land area	77.22 sq mi
Water area	1.66 sq mi
Latitude	39.1981
Longitude	-95.3483
Timezone	Central (CT)
Area code	785

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	28.4%	33.6%	41.1%
$50k – $100k	48.0%	37.4%	32.2%
$100k – $200k	19.0%	24.9%	21.0%
Over $200k	4.6%	4.1%	5.7%

Demographics & statistics

2,803

Population

People per sq mi

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

Income range	This ZIP	County avg	State avg
Under $50k	28.4%	33.6%	41.1%
$50k – $100k	48.0%	37.4%	32.2%
$100k – $200k	19.0%	24.9%	21.0%
Over $200k	4.6%	4.1%	5.7%

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%
Work from home	9.5%
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	%
Obesity	37.8%
High blood pressure	36.1%
High cholesterol	35.9%
Diabetes	11.2%
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	%
Smoking	19.4%
Binge drinking	16.8%
No physical activity	24.8%
Less than 7 hrs sleep	31.2%
Depression	19.3%
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%
No insurance	6.2%
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 about ZIP code 66066

What city is ZIP code 66066 in?

ZIP code 66066 is primarily assigned to Oskaloosa, Kansas.

What county is ZIP code 66066 in?

ZIP code 66066 falls within Jefferson County, Kansas.

Is ZIP code 66066 mostly owner-occupied?

89% of occupied units in ZIP code 66066 are owner-occupied, well above the national average.

What is the population of ZIP code 66066?

ZIP code 66066 has an estimated population of 2,803 residents, with a density of 36 people per square mile.

What is the typical home value in ZIP code 66066?

The median home value in ZIP code 66066 is $214,000.

What is the median household income in ZIP code 66066?

The median household income in ZIP code 66066 is $74,356, below the national median of ~$75,000.

What timezone is ZIP code 66066 in?

ZIP code 66066 observes the CST timezone.