66531 ZIP Code — Riley, KS

Riley County, Kansas

ZIP code 66531 is located in Riley, Kansas, within Riley County. It covers approximately 35.25 square miles and serves a population of 1,425 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 785.

About ZIP code 66531

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 $174,900. Owner-occupancy is high at 92%, well above the national average.

Median household income is $74,492. 41% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 27 minutes is near the national average.

Educational attainment is near the national average, with 35% of residents holding a bachelor's degree or higher.

Overall, ZIP code 66531 reflects a community defined by high homeownership and a significant Social Security-dependent population.

1,425

population

35.25

sq mi land

Standard

ZIP type

Central (CT)

timezone

66531 ZIP code map

Cities in ZIP code 66531

Below are the cities the US Postal Service accepts for ZIP code 66531. Using any city not on this list may result in mail delivery delays.

City	Status
Riley	Preferred

Nearby ZIP codes

66514 Milford (6.2 mi) 66503 Manhattan (8.4 mi) 66517 Ogden (9.1 mi) 66442 Fort Riley (9.7 mi) 66449 Leonardville (11.5 mi) 66506 Manhattan (12.9 mi) 67487 Wakefield (13.5 mi) 66502 Manhattan (15 mi) 66441 Junction City (16.1 mi) 66554 Randolph (18.1 mi) 66520 Olsburg (18.1 mi) 67431 Chapman (19.7 mi)

Demographics updated 05/2026

Population
Total population	1,425
Population density	40 / sq mi
State FIPS	20
County FIPS	161

Geography
Land area	35.25 sq mi
Water area	0.03 sq mi
Latitude	39.2177
Longitude	-96.8214
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	31.1%	45.7%	41.1%
$50k – $100k	32.5%	30.1%	32.2%
$100k – $200k	31.4%	19.4%	21.0%
Over $200k	5.0%	4.9%	5.7%

Demographics & statistics

1,425

Population

People per sq mi

37.8

Median age

$74,492

Median household income

$34,903

Per capita income

$174,900

Median home value

$1,071

Median monthly rent

92.3%

Home ownership

1.3%

Poverty rate

0.9%

Unemployment

583

Housing units

34.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

102

111

35–44

130

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	368	25.8%
18 and over	1,057	74.2%
65 and over	227	15.9%
Median age	37.8 years

Race & ethnicity

White 97.8%

Two or more races 2.2%

Group	Count	%
White	1,394	97.8%
Two or more races	31	2.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	31.1%	45.7%	41.1%
$50k – $100k	32.5%	30.1%	32.2%
$100k – $200k	31.4%	19.4%	21.0%
Over $200k	5.0%	4.9%	5.7%

Under $10k 0.4%

$10k–$15k 1.1%

$15k–$25k 1.6%

$25k–$35k 5.3%

$35k–$50k 23.8%

$50k–$75k 19.0%

$75k–$100k 9.1%

$100k–$150k 21.6%

$150k–$200k 16.5%

$200k+ 1.6%

Range	% of households
Under $10k	0.4%
$10k–$15k	1.1%
$15k–$25k	1.6%
$25k–$35k	5.3%
$35k–$50k	23.8%
$50k–$75k	19.0%
$75k–$100k	9.1%
$100k–$150k	21.6%
$150k–$200k	16.5%
$200k+	1.6%
Median income	$74,492

Housing

Home values

Under $50k 1.6%

$50k–$100k 9.5%

$100k–$150k 13.3%

$150k–$200k 31.7%

$200k–$300k 32.1%

$300k–$500k 9.9%

$500k–$1M 2.0%

Housing overview

Metric	Value
Median home value	$174,900
Median rent / month	$1,071
Owner occupied	92.3%
Renter occupied	7.7%
Vacant	12.5%
Single-family detached	78.6%
Large apartment buildings	1.0%
Mobile homes	18.2%
Median rooms	6.2
Avg household size (owned)	2.62

Year built

Era	%
2020 or later	0.2%
2010–2019	9.9%
2000–2009	11.5%
1990–1999	21.8%
1980–1989	0.8%
1970–1979	6.1%
1960–1969	6.9%
1950–1959	10.6%
1940–1949	4.5%
1939 or earlier	27.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.5%
1 bedroom	0.8%
2 bedrooms	18.7%
3 bedrooms	47.0%
4 bedrooms	25.3%
5+ bedrooms	7.7%

Vehicles per household

Vehicles	% of households
No vehicle	0.5%
1 vehicle	11.0%
2 vehicles	47.7%
3 or more	40.8%

Heating fuel

Fuel type	%
Utility gas	3.8%
Electricity	7.1%
Propane / LP gas	72.8%
Fuel oil	1.5%
Wood	14.3%

Households & families

Household type	Count	%
Married-couple family	436	79.7%
Cohabiting couple	8	1.5%
Male householder, no spouse	40	7.3%
Female householder, no spouse	63	11.5%
Households with children under 18	193	35.3%
Households with seniors (65+)	209	38.2%
Average household size	2.61

Marital status

Status	Male	Female
Never married	18.7%	11.2%
Married	72.2%	75.2%
Separated	1.4%	0.0%
Widowed	0.0%	3.3%
Divorced	7.7%	10.2%

Education

Less than 9th grade 0.4%

Some HS, no diploma 0.9%

HS graduate 20.6%

Some college, no degree 27.9%

Associate's degree 15.4%

Bachelor's degree 30.2%

Graduate / professional 4.6%

Metric	%
HS diploma or higher	98.7%
Bachelor's or higher	34.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	27	10.6%
Kindergarten	13	5.1%
Elementary school	137	53.9%
High school	58	22.8%
College / grad school	19	7.5%

Employment

Industry of employment

Education & healthcare 28.7%

Professional & management 14.0%

Finance & real estate 9.3%

Other services 7.6%

Arts, food & hospitality 6.4%

Retail trade 6.3%

Construction 5.9%

Transportation & utilities 5.9%

Public administration 5.9%

Manufacturing 3.7%

Agriculture & mining 3.1%

Wholesale trade 2.0%

Information 1.3%

Occupation

Category	%
Management, business & arts	47.5%
Service	15.9%
Sales & office	16.3%
Natural resources & construction	8.9%
Production & transportation	11.5%

Employment type

Type	%
Private sector	58.3%
Government	29.6%
Self-employed	9.9%
Unpaid family workers	2.3%

Commute

Method	%
Drive alone	75.3%
Carpool	11.4%
Public transit	0.0%
Walk	1.7%
Work from home	11.2%
Other means	0.4%
Avg commute (minutes)	26.5

Poverty

All people 1.3%

Under 18 years 2.2%

18 and over 1.0%

Married-couple families 0.0%

Female-led households 7.1%

Income support

Source	% of households
Social Security	40.8%
Retirement income	39.9%
Supplemental Security	6.4%
Cash public assistance	0.5%
Food stamps / SNAP	1.3%

Health indicators

Condition	%
Obesity	30.5%
High blood pressure	27.0%
High cholesterol	30.6%
Diabetes	8.0%
Heart disease	4.8%
Stroke	2.1%
Asthma	8.8%
Arthritis	20.7%
Kidney disease	2.2%
Pulmonary disease	4.8%
Cancer	6.1%

Behavior / access	%
Smoking	15.7%
Binge drinking	21.2%
No physical activity	17.1%
Less than 7 hrs sleep	29.0%
Depression	17.8%
Fair or poor health	9.6%
Poor mental health	13.0%
Poor physical health	7.7%
No health insurance	11.0%
Visited doctor (checkup)	73.2%
Visited dentist	74.3%
Cholesterol screening	89.7%
Teeth loss	8.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	84	7.9%

Disability	%
Any disability	10.9%
Under 18	4.1%
18–64 years	14.3%
65 and over	9.7%

Health insurance coverage

Type	%
Private insurance	88.2%
Public insurance	24.2%
No insurance	4.9%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,281	89.9%
Spanish	3	0.2%
Other Indo-European	0	0.0%
Asian & Pacific Islander	3	0.2%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,423	99.9%
Born in same state	1,383	97.1%
Born in different state	1,014	71.2%
Foreign born	40	2.8%
Naturalized citizen	2	0.1%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	208	14.6%
Arab	68	4.8%
Italian	65	4.6%
German	23	1.6%

Ancestry	Count	%
English	12	0.8%
Polish	10	0.7%
Dutch	10	0.7%

Technology access

Metric	% of households
Computer access	38.4%
Internet access	98.4%

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

Frequently asked questions about ZIP code 66531

What city is ZIP code 66531 in?

ZIP code 66531 is primarily assigned to Riley, Kansas.

What county is ZIP code 66531 in?

ZIP code 66531 falls within Riley County, Kansas.

Is ZIP code 66531 mostly owner-occupied?

92% of occupied units in ZIP code 66531 are owner-occupied, well above the national average.

Does ZIP code 66531 have a large retiree population?

41% of households in ZIP code 66531 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 66531?

The median home value in ZIP code 66531 is $174,900.

What is the population of ZIP code 66531?

ZIP code 66531 has an estimated population of 1,425 residents, with a density of 40 people per square mile.

What timezone is ZIP code 66531 in?

ZIP code 66531 observes the CST timezone.