50440 ZIP Code — Grafton, IA
Worth County, Iowa
ZIP code 50440 is located in Grafton, Iowa, within Worth County. It covers approximately 29.24 square miles and serves a population of 340 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 641.
About ZIP code 50440
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 $99,400. Owner-occupancy sits near the national average at 60%.
Median household income is $81,250. The poverty rate of 5% is below the national average.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 26 minutes is near the national average.
Educational attainment is near the national average, with 27% of residents holding a bachelor's degree or higher.
340
population
29.24
sq mi land
Standard
ZIP type
Central (CT)
timezone
50440 ZIP code map
Cities in ZIP code 50440
Below are the cities the US Postal Service accepts for ZIP code 50440. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Grafton | Preferred |
Nearby ZIP codes
50464 Plymouth (5.5 mi)
50448 Kensett (5.8 mi)
50456 Manly (7.7 mi)
50472 Saint Ansgar (9.4 mi)
50459 Northwood (11.7 mi)
50458 Nora Springs (12 mi)
50401 Mason City (13.5 mi)
50461 Osage (14.7 mi)
50444 Hanlontown (15 mi)
56036 Glenville (15.5 mi)
50471 Rudd (16.2 mi)
55953 Lyle (16.4 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 340 |
| Population density | 12 / sq mi |
| State FIPS | 19 |
| County FIPS | 195 |
| Geography | |
|---|---|
| Land area | 29.24 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 43.3279 |
| Longitude | -93.0827 |
| 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 | 33.3% | 42.3% | 40.1% |
| $50k – $100k | 17.5% | 35.1% | 33.4% |
| $100k – $200k | 41.5% | 19.2% | 21.5% |
| Over $200k | 7.6% | 3.3% | 5.0% |
Demographics & statistics
340
Population
12
People per sq mi
39.1
Median age
$81,250
Median household income
$44,447
Per capita income
$99,400
Median home value
$623
Median monthly rent
60.1%
Home ownership
5.4%
Poverty rate
0.8%
Unemployment
117
Housing units
27.0%
Bachelor's or higher
Age distribution
Male
Female
5
Under 5
5
7
5–9
7
11
10–14
11
8
15–19
8
21
20–24
20
31
25–34
31
16
35–44
16
12
45–54
11
17
55–59
17
12
60–64
12
27
65–74
27
1
75–84
0
4
85+
3
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 55 | 16.2% |
| 18 and over | 285 | 83.8% |
| 65 and over | 62 | 18.2% |
| Median age | 39.1 years | |
Race & ethnicity
White
98.2%
Black or African American
0.6%
Hispanic or Latino
0.6%
Two or more races
0.6%
| Group | Count | % |
|---|---|---|
| White | 336 | 98.2% |
| Black or African American | 2 | 0.6% |
| Hispanic or Latino | 2 | 0.6% |
| Two or more races | 2 | 0.6% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 33.3% | 42.3% | 40.1% |
| $50k – $100k | 17.5% | 35.1% | 33.4% |
| $100k – $200k | 41.5% | 19.2% | 21.5% |
| Over $200k | 7.6% | 3.3% | 5.0% |
Under $10k
10.4%
$15k–$25k
7.4%
$25k–$35k
1.8%
$35k–$50k
14.7%
$50k–$75k
15.3%
$75k–$100k
6.7%
$100k–$150k
22.7%
$150k–$200k
4.3%
$200k+
16.6%
| Range | % of households |
|---|---|
| Under $10k | 10.4% |
| $15k–$25k | 7.4% |
| $25k–$35k | 1.8% |
| $35k–$50k | 14.7% |
| $50k–$75k | 15.3% |
| $75k–$100k | 6.7% |
| $100k–$150k | 22.7% |
| $150k–$200k | 4.3% |
| $200k+ | 16.6% |
| Median income | $81,250 |
Housing
Home values
Under $50k
6.1%
$50k–$100k
44.9%
$100k–$150k
15.3%
$150k–$200k
9.2%
$200k–$300k
22.4%
$300k–$500k
2.0%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $99,400 |
| Median rent / month | $623 |
| Owner occupied | 60.1% |
| Renter occupied | 39.9% |
| Vacant | 10.4% |
| Single-family detached | 91.2% |
| Large apartment buildings | 0.0% |
| Mobile homes | 0.0% |
| Median rooms | 6.3 |
| Avg household size (owned) | 2.39 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 0.0% |
| 2000–2009 | 4.9% |
| 1990–1999 | 1.6% |
| 1980–1989 | 3.8% |
| 1970–1979 | 15.4% |
| 1960–1969 | 20.3% |
| 1950–1959 | 3.8% |
| 1940–1949 | 15.4% |
| 1939 or earlier | 34.6% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.0% |
| 1 bedroom | 8.8% |
| 2 bedrooms | 23.1% |
| 3 bedrooms | 40.7% |
| 4 bedrooms | 22.5% |
| 5+ bedrooms | 4.9% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 0.6% |
| 1 vehicle | 27.0% |
| 2 vehicles | 27.0% |
| 3 or more | 45.4% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 0.6% |
| Electricity | 11.0% |
| Propane / LP gas | 88.3% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 67 | 41.1% |
| Cohabiting couple | 11 | 6.7% |
| Male householder, no spouse | 48 | 29.4% |
| Female householder, no spouse | 37 | 22.7% |
| Households with children under 18 | 30 | 18.4% |
| Households with seniors (65+) | 43 | 26.4% |
| Average household size | 2.09 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 39.6% | 44.3% |
| Married | 46.1% | 49.3% |
| Separated | 0.6% | 0.0% |
| Widowed | 0.0% | 6.4% |
| Divorced | 13.6% | 0.0% |
Education
Less than 9th grade
2.1%
Some HS, no diploma
6.3%
HS graduate
23.2%
Some college, no degree
12.2%
Associate's degree
29.1%
Bachelor's degree
16.0%
Graduate / professional
11.0%
| Metric | % |
|---|---|
| HS diploma or higher | 91.6% |
| Bachelor's or higher | 27.0% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 6 | 9.5% |
| Kindergarten | 4 | 6.3% |
| Elementary school | 30 | 47.6% |
| High school | 9 | 14.3% |
| College / grad school | 14 | 22.2% |
Employment
Industry of employment
Education & healthcare
17.1%
Professional & management
15.0%
Manufacturing
12.1%
Other services
10.8%
Finance & real estate
10.0%
Retail trade
7.5%
Agriculture & mining
5.8%
Construction
5.8%
Information
5.4%
Transportation & utilities
5.0%
Arts, food & hospitality
4.2%
Wholesale trade
1.3%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 43.3% |
| Service | 6.7% |
| Sales & office | 26.3% |
| Natural resources & construction | 17.9% |
| Production & transportation | 5.8% |
Employment type
| Type | % |
|---|---|
| Private sector | 80.0% |
| Government | 7.9% |
| Self-employed | 12.1% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 91.2% |
| Carpool | 1.7% |
| Public transit | 0.0% |
| Walk | 1.7% |
| Work from home | 5.4% |
| Other means | 0.0% |
| Avg commute (minutes) | 26.1 |
Poverty
All people
5.4%
Under 18 years
0.0%
18 and over
6.3%
Married-couple families
0.0%
Female-led households
0.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 27.6% |
| Retirement income | 15.3% |
| Supplemental Security | 0.0% |
| Cash public assistance | 0.0% |
| Food stamps / SNAP | 8.6% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 35.3% |
| High blood pressure | 34.6% |
| High cholesterol | 33.1% |
| Diabetes | 10.4% |
| Heart disease | 7.3% |
| Stroke | 3.3% |
| Asthma | 9.3% |
| Arthritis | 26.2% |
| Kidney disease | 3.0% |
| Pulmonary disease | 7.2% |
| Cancer | 7.4% |
| Behavior / access | % |
|---|---|
| Smoking | 18.7% |
| Binge drinking | 21.4% |
| No physical activity | 25.7% |
| Less than 7 hrs sleep | 31.4% |
| Depression | 17.7% |
| Fair or poor health | 13.2% |
| Poor mental health | 13.3% |
| Poor physical health | 10.1% |
| No health insurance | 9.1% |
| Visited doctor (checkup) | 75.1% |
| Visited dentist | 68.3% |
| Cholesterol screening | 89.0% |
| Teeth loss | 13.7% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 15 | 5.3% |
| Disability | % |
|---|---|
| Any disability | 10.9% |
| Under 18 | 0.0% |
| 18–64 years | 9.4% |
| 65 and over | 25.8% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 79.4% |
| Public insurance | 29.1% |
| No insurance | 4.1% |
| Uninsured under 19 | 0.0% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 330 | 97.1% |
| Spanish | 0 | 0.0% |
| Other Indo-European | 0 | 0.0% |
| Asian & Pacific Islander | 0 | 0.0% |
| Other languages | 0 | 0.0% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 338 | 99.4% |
| Born in same state | 338 | 99.4% |
| Born in different state | 250 | 73.5% |
| Foreign born | 0 | 0.0% |
| Naturalized citizen | 2 | 0.6% |
| Not a US citizen | 0 | 0.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Polish | 68 | 20% |
| English | 34 | 10% |
| Italian | 25 | 7.4% |
| Ancestry | Count | % |
|---|---|---|
| French | 9 | 2.6% |
| Arab | 4 | 1.2% |
| Dutch | 2 | 0.6% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 47.9% |
| Internet access | 82.8% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 50440
What city is ZIP code 50440 in?
ZIP code 50440 is primarily assigned to Grafton, Iowa.
What county is ZIP code 50440 in?
ZIP code 50440 falls within Worth County, Iowa.
What is the typical home value in ZIP code 50440?
The median home value in ZIP code 50440 is $99,400.
What is the population of ZIP code 50440?
ZIP code 50440 has an estimated population of 340 residents, with a density of 12 people per square mile.
What is the median household income in ZIP code 50440?
The median household income in ZIP code 50440 is $81,250, above the national median of ~$75,000.
What timezone is ZIP code 50440 in?
ZIP code 50440 observes the CST timezone.