Grafton ZIP Codes — Worth County, IA

There is one unique ZIP code in Grafton, Iowa and it is 50440. Area code: 641.
1
ZIP codes
29.24
sq mi land
0.00
sq mi water
641
area code
Grafton, IA ZIP code map

About Grafton, IA

Grafton is a charming city located in Worth County, Iowa. With a rich rural heritage, it serves as a quaint community with deep agricultural connections. Residents enjoy a close-knit atmosphere, creating a friendly environment that welcomes newcomers and visitors alike.

Location & geography

Grafton is positioned in north-central Iowa, situated near the banks of the Shell Rock River. It is approximately 10 miles southwest of the larger city of Mason City and about 30 miles northeast of the city of Decorah. The city's land area spans 29.24 square miles with no significant water coverage, showcasing a predominantly flat terrain suitable for farming and rural living.

Community & economy

The character of Grafton is defined by a small-town ambiance where community events frequently bring residents together. The local economy is primarily driven by agriculture, with many residents engaged in farming and related industries. Daily life in Grafton reflects a strong sense of community, with local businesses and churches playing a vital role in the social fabric of the town.

Transportation

Grafton is accessible via U.S. Highway 65, which caters to regional traffic and connects residents to larger cities. The nearest commercial airport is located in Mason City, providing air travel options for residents and visitors alike. Public transit options may be limited, emphasizing the need for personal vehicles in this rural setting.

History

Grafton was founded in the late 19th century as a railroad town, which boosted the local agricultural industry and streamlined goods transport. Over the years, the city has maintained its agricultural roots while adapting to the changes in farming practices and technology. Key historical events in Grafton's development include the establishment of local institutions that became pillars of community life.

Did you know?

A surprising fact about Grafton is its close cooperation with nearby communities to host regional events that celebrate their agricultural heritage. Despite its small size, Grafton has a robust network of community involvement that fosters a tight-knit social environment.

ZIP codes for Grafton, IA (1)
ZIP code City County Map
50440 Grafton Worth View map

Demographics & statistics

340
Population
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

GroupCount%
Under 185516.2%
18 and over28583.8%
65 and over6218.2%
Median age39.1 years

Race & ethnicity

White 98.2%
Black or African American 0.6%
Hispanic or Latino 0.6%
Two or more races 0.6%
GroupCount%
White33698.2%
Black or African American20.6%
Hispanic or Latino20.6%
Two or more races20.6%

Household income

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 $10k10.4%
$15k–$25k7.4%
$25k–$35k1.8%
$35k–$50k14.7%
$50k–$75k15.3%
$75k–$100k6.7%
$100k–$150k22.7%
$150k–$200k4.3%
$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

MetricValue
Median home value$99,400
Median rent / month$623
Owner occupied60.1%
Renter occupied39.9%
Vacant10.4%
Single-family detached91.2%
Large apartment buildings0.0%
Mobile homes0.0%
Median rooms6.3
Avg household size (owned)2.39

Year built

Era%
2020 or later0.0%
2010–20190.0%
2000–20094.9%
1990–19991.6%
1980–19893.8%
1970–197915.4%
1960–196920.3%
1950–19593.8%
1940–194915.4%
1939 or earlier34.6%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom8.8%
2 bedrooms23.1%
3 bedrooms40.7%
4 bedrooms22.5%
5+ bedrooms4.9%

Vehicles per household

Vehicles% of households
No vehicle0.6%
1 vehicle27.0%
2 vehicles27.0%
3 or more45.4%

Heating fuel

Fuel type%
Utility gas0.6%
Electricity11.0%
Propane / LP gas88.3%

Households & families

Household typeCount%
Married-couple family6741.1%
Cohabiting couple116.7%
Male householder, no spouse4829.4%
Female householder, no spouse3722.7%
Households with children under 183018.4%
Households with seniors (65+)4326.4%
Average household size2.09

Marital status

StatusMaleFemale
Never married39.6%44.3%
Married46.1%49.3%
Separated0.6%0.0%
Widowed0.0%6.4%
Divorced13.6%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 higher91.6%
Bachelor's or higher27.0%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool69.5%
Kindergarten46.3%
Elementary school3047.6%
High school914.3%
College / grad school1422.2%

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 & arts43.3%
Service6.7%
Sales & office26.3%
Natural resources & construction17.9%
Production & transportation5.8%

Employment type

Type%
Private sector80.0%
Government7.9%
Self-employed12.1%
Unpaid family workers0.0%

Commute

Method%
Drive alone91.2%
Carpool1.7%
Public transit0.0%
Walk1.7%
Other means0.0%
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 Security27.6%
Retirement income15.3%
Supplemental Security0.0%
Cash public assistance0.0%
Food stamps / SNAP8.6%

Health indicators

Condition%
High blood pressure34.6%
High cholesterol33.1%
Heart disease7.3%
Stroke3.3%
Asthma9.3%
Arthritis26.2%
Kidney disease3.0%
Pulmonary disease7.2%
Cancer7.4%
Behavior / access%
Binge drinking21.4%
No physical activity25.7%
Less than 7 hrs sleep31.4%
Fair or poor health13.2%
Poor mental health13.3%
Poor physical health10.1%
No health insurance9.1%
Visited doctor (checkup)75.1%
Visited dentist68.3%
Cholesterol screening89.0%
Teeth loss13.7%

Veterans & disability

VeteransCount%
Civilian veterans155.3%
Disability%
Any disability10.9%
Under 180.0%
18–64 years9.4%
65 and over25.8%

Health insurance coverage

Type%
Private insurance79.4%
Public insurance29.1%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only33097.1%
Spanish00.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)33899.4%
Born in same state33899.4%
Born in different state25073.5%
Foreign born00.0%
Naturalized citizen20.6%
Not a US citizen00.0%

Ancestry

AncestryCount%
Polish6820%
English3410%
Italian257.4%
AncestryCount%
French92.6%
Arab41.2%
Dutch20.6%

Technology access

Metric% of households
Computer access47.9%
Internet access82.8%

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

Frequently asked questions
What ZIP codes does Grafton, IA have?
Grafton, IA has one ZIP code: 50440. Each ZIP code serves a distinct delivery area within the city and surrounding region.
Need the complete Iowa ZIP code database? Download all IA ZIP codes — Excel, CSV, or Access. Includes lat/lng, county FIPS & timezone.
Download database →