66427 ZIP Code — Frankfort, KS

Marshall County, Kansas

ZIP code 66427 is located in Frankfort, Kansas, within Marshall County. It covers approximately 211.35 square miles and serves a population of 1,239 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 785.

About ZIP code 66427

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 $107,500. Owner-occupancy is high at 91%, well above the national average.

Median household income is $74,917. The poverty rate of 7% is below the national average. 43% 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 20 minutes is near the national average.

Educational attainment is near the national average, with 26% of residents holding a bachelor's degree or higher.

Overall, ZIP code 66427 reflects a community defined by high homeownership and a significant Social Security-dependent population.

1,239
population
211.35
sq mi land
Standard
ZIP type
Central (CT)
timezone
66427 ZIP code map
Cities in ZIP code 66427

Below are the cities the US Postal Service accepts for ZIP code 66427. Using any city not on this list may result in mail delivery delays.

City Status
Frankfort Acceptable
Frankfort Preferred
Nearby ZIP codes
66411 Blue Rapids (9.9 mi) 66438 Home (10.1 mi) 66406 Beattie (14.5 mi) 66415 Centralia (14.8 mi) 66508 Marysville (15.5 mi) 66548 Waterville (15.6 mi) 66403 Axtell (15.9 mi) 66541 Summerfield (18.2 mi) 66518 Oketo (18.4 mi) 66549 Westmoreland (18.8 mi) 66404 Baileyville (19.5 mi)
Demographics updated 05/2026
Population
Total population 1,239
Population density 6 / sq mi
State FIPS 20
County FIPS 117
Geography
Land area 211.35 sq mi
Water area 1.33 sq mi
Latitude 39.7039
Longitude -96.4575
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 38.0% 46.5% 41.1%
$50k – $100k 39.1% 35.6% 32.2%
$100k – $200k 17.5% 15.0% 21.0%
Over $200k 5.4% 2.9% 5.7%

Demographics & statistics

1,239
Population
6
People per sq mi
48.1
Median age
$74,917
Median household income
$39,957
Per capita income
$107,500
Median home value
$667
Median monthly rent
90.5%
Home ownership
6.5%
Poverty rate
1.1%
Unemployment
588
Housing units
25.8%
Bachelor's or higher

Age distribution

Male Female
42
Under 5
34
31
5–9
26
35
10–14
28
36
15–19
30
47
20–24
38
61
25–34
50
63
35–44
51
78
45–54
64
65
55–59
53
54
60–64
45
75
65–74
61
79
75–84
65
15
85+
13
← Male
Female →

Age summary

GroupCount%
Under 1824319.6%
18 and over99680.4%
65 and over30824.9%
Median age48.1 years

Race & ethnicity

White 98.8%
Black or African American 0.9%
Two or more races 0.2%
Hispanic or Latino 0.1%
GroupCount%
White1,22598.8%
Black or African American110.9%
Two or more races30.2%
Hispanic or Latino10.1%

Household income

Income range This ZIP County avg State avg
Under $50k 38.0% 46.5% 41.1%
$50k – $100k 39.1% 35.6% 32.2%
$100k – $200k 17.5% 15.0% 21.0%
Over $200k 5.4% 2.9% 5.7%
Under $10k 2.1%
$10k–$15k 2.1%
$15k–$25k 4.4%
$25k–$35k 6.8%
$35k–$50k 11.9%
$50k–$75k 23.1%
$75k–$100k 12.9%
$100k–$150k 23.7%
$150k–$200k 10.0%
$200k+ 3.0%
Range% of households
Under $10k2.1%
$10k–$15k2.1%
$15k–$25k4.4%
$25k–$35k6.8%
$35k–$50k11.9%
$50k–$75k23.1%
$75k–$100k12.9%
$100k–$150k23.7%
$150k–$200k10.0%
$200k+3.0%
Median income$74,917

Housing

Home values

Under $50k 21.3%
$50k–$100k 25.3%
$100k–$150k 28.5%
$150k–$200k 5.6%
$200k–$300k 6.7%
$300k–$500k 11.5%
$500k–$1M 1.0%

Housing overview

MetricValue
Median home value$107,500
Median rent / month$667
Owner occupied90.5%
Renter occupied9.5%
Vacant17.2%
Single-family detached87.5%
Large apartment buildings0.0%
Mobile homes7.7%
Median rooms6.2
Avg household size (owned)2.29

Year built

Era%
2020 or later0.8%
2010–20193.6%
2000–20098.2%
1990–19996.3%
1980–198913.3%
1970–197913.2%
1960–19698.6%
1950–19598.0%
1940–19494.7%
1939 or earlier33.4%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom6.7%
2 bedrooms32.4%
3 bedrooms44.8%
4 bedrooms12.7%
5+ bedrooms3.3%

Vehicles per household

Vehicles% of households
No vehicle2.3%
1 vehicle20.3%
2 vehicles26.9%
3 or more50.6%

Heating fuel

Fuel type%
Utility gas52.1%
Electricity17.0%
Propane / LP gas22.7%
Fuel oil2.8%
Wood4.5%

Households & families

Household typeCount%
Married-couple family35266.7%
Cohabiting couple142.7%
Male householder, no spouse8716.5%
Female householder, no spouse7514.2%
Households with children under 1810319.5%
Households with seniors (65+)21140.0%
Average household size2.28

Marital status

StatusMaleFemale
Never married22.2%15.4%
Married64.5%64.2%
Separated0.0%0.0%
Widowed2.7%12.1%
Divorced10.7%8.3%

Education

Less than 9th grade 0.8%
Some HS, no diploma 4.7%
HS graduate 31.7%
Some college, no degree 30.2%
Associate's degree 6.8%
Bachelor's degree 21.4%
Graduate / professional 4.4%
Metric%
HS diploma or higher94.5%
Bachelor's or higher25.8%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool4221.3%
Kindergarten157.6%
Elementary school7538.1%
High school6131.0%
College / grad school42.0%

Employment

Industry of employment

Education & healthcare 35.2%
Manufacturing 14.1%
Agriculture & mining 11.5%
Construction 10.8%
Professional & management 8.9%
Retail trade 4.6%
Transportation & utilities 4.6%
Other services 2.6%
Finance & real estate 2.5%
Public administration 2.5%
Wholesale trade 1.2%
Arts, food & hospitality 1.2%
Information 0.3%

Occupation

Category%
Management, business & arts45.6%
Service9.5%
Sales & office13.8%
Natural resources & construction12.1%
Production & transportation18.9%

Employment type

Type%
Private sector71.0%
Government13.4%
Self-employed14.1%
Unpaid family workers1.5%

Commute

Method%
Drive alone71.7%
Carpool9.3%
Public transit0.0%
Walk7.7%
Work from home11.2%
Other means0.2%
Avg commute (minutes)20.1

Poverty

All people 6.5%
Under 18 years 6.4%
18 and over 6.5%
Married-couple families 3.1%
Female-led households 0.0%

Income support

Source% of households
Social Security43.4%
Retirement income31.1%
Supplemental Security1.9%
Cash public assistance0.8%
Food stamps / SNAP2.8%

Health indicators

Condition%
Obesity34.8%
High blood pressure38.6%
High cholesterol36.3%
Diabetes11.1%
Heart disease8.3%
Stroke3.6%
Asthma8.9%
Arthritis27.7%
Kidney disease3.4%
Pulmonary disease7.4%
Cancer8.7%
Behavior / access%
Smoking17.1%
Binge drinking16.2%
No physical activity24.7%
Less than 7 hrs sleep29.6%
Depression17.8%
Fair or poor health13.9%
Poor mental health12.7%
Poor physical health10.3%
No health insurance13.6%
Visited doctor (checkup)75.5%
Visited dentist64.8%
Cholesterol screening89.9%
Teeth loss13.8%

Veterans & disability

VeteransCount%
Civilian veterans515.1%
Disability%
Any disability9.0%
Under 183.3%
18–64 years8.2%
65 and over15.7%

Health insurance coverage

Type%
Private insurance75.7%
Public insurance35.4%
No insurance7.3%
Uninsured under 194.9%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only1,16393.9%
Spanish00.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)1,23799.8%
Born in same state1,21297.8%
Born in different state96978.2%
Foreign born252.0%
Naturalized citizen20.2%
Not a US citizen2100.0%

Ancestry

AncestryCount%
Italian23218.7%
French16113%
Arab917.3%
Dutch362.9%
AncestryCount%
English70.6%
Polish40.3%
German20.2%

Technology access

Metric% of households
Computer access42.6%
Internet access97.7%

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

Frequently asked questions about ZIP code 66427

What city is ZIP code 66427 in?

ZIP code 66427 is primarily assigned to Frankfort, Kansas.

What county is ZIP code 66427 in?

ZIP code 66427 falls within Marshall County, Kansas.

Is ZIP code 66427 mostly owner-occupied?

91% of occupied units in ZIP code 66427 are owner-occupied, well above the national average.

Does ZIP code 66427 have a large retiree population?

43% of households in ZIP code 66427 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 66427?

The median home value in ZIP code 66427 is $107,500.

What is the population of ZIP code 66427?

ZIP code 66427 has an estimated population of 1,239 residents, with a density of 6 people per square mile.

What timezone is ZIP code 66427 in?

ZIP code 66427 observes the CST timezone.

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