50431 ZIP Code — Coulter, IA

Franklin County, Iowa

ZIP code 50431 is located in Coulter, Iowa, within Franklin County. It covers approximately 0.75 square miles and serves a population of 206 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 641.

About ZIP code 50431

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 $76,700. Owner-occupancy sits near the national average at 68%.

Median household income is $46,563.

The dominant occupation class is sales and office, with agriculture and mining as the leading industry. The average commute of 18 minutes is near the national average.

College attainment at 7% is below the national average, consistent with a trades and production-oriented local economy.

Notable community characteristics include Spanish spoken in 28% of households.

206
population
0.75
sq mi land
Standard
ZIP type
Central (CT)
timezone
50431 ZIP code map
Cities in ZIP code 50431

Below are the cities the US Postal Service accepts for ZIP code 50431. Using any city not on this list may result in mail delivery delays.

City Status
Coulter Acceptable
Demographics updated 05/2026
Population
Total population 206
Population density 275 / sq mi
State FIPS 19
County FIPS 069
Geography
Land area 0.75 sq mi
Water area 0.00 sq mi
Latitude 42.7383
Longitude -93.3799
Timezone Central (CT)
Area code 641
Total population by age
Gender
Race & ethnicity
Economics updated 05/2026
Household income
Income range This ZIP County avg State avg
Under $50k 52.3% 46.1% 40.1%
$50k – $100k 39.8% 37.7% 33.4%
$100k – $200k 8.0% 14.2% 21.5%
Over $200k 0.0% 2.0% 5.0%

Demographics & statistics

206
Population
275
People per sq mi
37.8
Median age
$46,563
Median household income
$22,814
Per capita income
$76,700
Median home value
$619
Median monthly rent
68.4%
Home ownership
12.1%
Poverty rate
8.7%
Unemployment
79
Housing units
7.2%
Bachelor's or higher

Age distribution

Male Female
8
Under 5
5
21
5–9
13
6
10–14
4
7
15–19
4
8
20–24
5
7
25–34
4
15
35–44
10
22
45–54
14
10
55–59
7
9
60–64
6
10
65–74
6
3
75–84
2
← Male
Female →

Age summary

GroupCount%
Under 186833.0%
18 and over13867.0%
65 and over2110.2%
Median age37.8 years

Race & ethnicity

White 67.5%
Two or more races 17.3%
Hispanic or Latino 15.2%
GroupCount%
White16467.5%
Two or more races4217.3%
Hispanic or Latino3715.2%

Household income

Income range This ZIP County avg State avg
Under $50k 52.3% 46.1% 40.1%
$50k – $100k 39.8% 37.7% 33.4%
$100k – $200k 8.0% 14.2% 21.5%
Over $200k 0.0% 2.0% 5.0%
Under $10k 5.1%
$10k–$15k 13.9%
$15k–$25k 10.1%
$25k–$35k 2.5%
$35k–$50k 20.3%
$50k–$75k 15.2%
$75k–$100k 17.7%
$100k–$150k 12.7%
$150k–$200k 2.5%
Range% of households
Under $10k5.1%
$10k–$15k13.9%
$15k–$25k10.1%
$25k–$35k2.5%
$35k–$50k20.3%
$50k–$75k15.2%
$75k–$100k17.7%
$100k–$150k12.7%
$150k–$200k2.5%
Median income$46,563

Housing

Home values

Under $50k 18.5%
$50k–$100k 63.0%
$100k–$150k 5.6%
$150k–$200k 5.6%
$200k–$300k 7.4%

Housing overview

MetricValue
Median home value$76,700
Median rent / month$619
Owner occupied68.4%
Renter occupied31.6%
Vacant24.0%
Single-family detached79.8%
Large apartment buildings0.0%
Mobile homes0.0%
Median rooms5.7
Avg household size (owned)2.39

Year built

Era%
2020 or later0.0%
2010–20190.0%
2000–20090.0%
1990–19998.7%
1980–198913.5%
1970–19793.8%
1960–196911.5%
1950–19596.7%
1940–19496.7%
1939 or earlier49.0%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom17.3%
2 bedrooms29.8%
3 bedrooms40.4%
4 bedrooms8.7%
5+ bedrooms3.8%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle34.2%
2 vehicles53.2%
3 or more12.7%

Heating fuel

Fuel type%
Utility gas69.6%
Electricity30.4%

Households & families

Household typeCount%
Married-couple family4354.4%
Cohabiting couple11.3%
Male householder, no spouse1822.8%
Female householder, no spouse1721.5%
Households with children under 182126.6%
Households with seniors (65+)1822.8%
Average household size2.61

Marital status

StatusMaleFemale
Never married44.4%23.5%
Married45.7%66.2%
Separated0.0%0.0%
Widowed1.2%4.4%
Divorced8.6%5.9%

Education

Less than 9th grade 6.4%
Some HS, no diploma 7.2%
HS graduate 48.8%
Some college, no degree 26.4%
Associate's degree 4.0%
Bachelor's degree 6.4%
Graduate / professional 0.8%
Metric%
HS diploma or higher86.4%
Bachelor's or higher7.2%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool00.0%
Kindergarten59.1%
Elementary school3970.9%
High school1120.0%
College / grad school00.0%

Employment

Industry of employment

Agriculture & mining 18.9%
Manufacturing 18.9%
Construction 9.5%
Education & healthcare 9.5%
Wholesale trade 6.3%
Retail trade 6.3%
Transportation & utilities 6.3%
Information 5.3%
Professional & management 5.3%
Other services 5.3%
Public administration 5.3%
Arts, food & hospitality 3.2%

Occupation

Category%
Management, business & arts12.6%
Service9.5%
Sales & office28.4%
Natural resources & construction27.4%
Production & transportation22.1%

Employment type

Type%
Private sector71.6%
Government22.1%
Self-employed6.3%
Unpaid family workers0.0%

Commute

Method%
Drive alone74.5%
Carpool11.7%
Public transit0.0%
Walk5.3%
Work from home8.5%
Other means0.0%
Avg commute (minutes)17.6

Poverty

All people 12.1%
Under 18 years 5.9%
18 and over 15.2%
Married-couple families 0.0%
Female-led households 33.3%

Income support

Source% of households
Social Security24.1%
Retirement income5.1%
Supplemental Security5.1%
Cash public assistance0.0%
Food stamps / SNAP5.1%

Health indicators

Condition%
Obesity41.9%
High blood pressure31.7%
High cholesterol30.5%
Diabetes9.9%
Heart disease5.9%
Stroke2.8%
Asthma9.4%
Arthritis22.9%
Kidney disease2.7%
Pulmonary disease6.7%
Cancer5.9%
Behavior / access%
Smoking18.7%
Binge drinking23.2%
No physical activity25.4%
Less than 7 hrs sleep30.7%
Depression18.1%
Fair or poor health13.2%
Poor mental health13.9%
Poor physical health9.9%
No health insurance11.5%
Visited doctor (checkup)72.9%
Visited dentist64.4%
Cholesterol screening86.8%
Teeth loss13.2%

Veterans & disability

VeteransCount%
Civilian veterans32.2%
Disability%
Any disability7.3%
Under 180.0%
18–64 years8.5%
65 and over23.8%

Health insurance coverage

Type%
Private insurance78.6%
Public insurance20.4%
No insurance5.8%
Uninsured under 195.9%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only19393.7%
Spanish5327.5%
Other Indo-European5327.5%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)18790.8%
Born in same state18388.8%
Born in different state13163.6%
Foreign born41.9%
Naturalized citizen199.2%
Not a US citizen842.1%

Ancestry

AncestryCount%
Italian94.4%
French94.4%
AncestryCount%
Dutch73.4%
Polish41.9%

Technology access

Metric% of households
Computer access38.3%
Internet access64.6%

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

Frequently asked questions about ZIP code 50431

What city is ZIP code 50431 in?

ZIP code 50431 is primarily assigned to Coulter, Iowa.

What county is ZIP code 50431 in?

ZIP code 50431 falls within Franklin County, Iowa.

Is ZIP code 50431 family-oriented?

33% of residents in ZIP code 50431 are under 18, reflecting a younger, family-oriented community.

Is Spanish widely spoken in ZIP code 50431?

Approximately 28% of households in ZIP code 50431 speak Spanish as a primary language.

How educated is the population of ZIP code 50431?

7% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the typical home value in ZIP code 50431?

The median home value in ZIP code 50431 is $76,700.

What timezone is ZIP code 50431 in?

ZIP code 50431 observes the CST timezone.

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