50638 ZIP Code — Grundy Center, IA

Grundy County, Iowa

ZIP code 50638 is located in Grundy Center, Iowa, within Grundy County. It covers approximately 93.98 square miles and serves a population of 3,330 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 319.

About ZIP code 50638

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 $157,100. Owner-occupancy is high at 81%, well above the national average.

Median household income is $81,446. 36% 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 23 minutes is near the national average.

Educational attainment is near the national average, with 28% of residents holding a bachelor's degree or higher.

Overall, ZIP code 50638 reflects a community defined by high homeownership and a significant Social Security-dependent population.

3,330
population
93.98
sq mi land
Standard
ZIP type
Central (CT)
timezone
50638 ZIP code map
Cities in ZIP code 50638

Below are the cities the US Postal Service accepts for ZIP code 50638. Using any city not on this list may result in mail delivery delays.

City Status
Grundy Center Preferred
Nearby ZIP codes
50642 Holland (4.2 mi) 50680 Wellsburg (6.6 mi) 50609 Beaman (9.8 mi) 50621 Conrad (10.3 mi) 50624 Dike (11.5 mi) 50672 Steamboat Rock (12 mi) 50669 Reinbeck (12 mi) 50627 Eldora (13.3 mi) 50665 Parkersburg (14.2 mi) 50635 Gladbrook (14.9 mi) 50148 Liscomb (15.9 mi) 50604 Aplington (16.1 mi)
Demographics updated 05/2026
Population
Total population 3,330
Population density 35 / sq mi
State FIPS 19
County FIPS 075
Geography
Land area 93.98 sq mi
Water area 0.00 sq mi
Latitude 42.3763
Longitude -92.8364
Timezone Central (CT)
Area code 319
Total population by age
Gender
Race & ethnicity
Economics updated 05/2026
Household income
Income range This ZIP County avg State avg
Under $50k 30.6% 32.5% 40.1%
$50k – $100k 42.0% 38.6% 33.4%
$100k – $200k 21.9% 22.8% 21.5%
Over $200k 5.5% 6.2% 5.0%

Demographics & statistics

3,330
Population
35
People per sq mi
37.5
Median age
$81,446
Median household income
$36,202
Per capita income
$157,100
Median home value
$644
Median monthly rent
80.8%
Home ownership
8.2%
Poverty rate
3.1%
Unemployment
1,115
Housing units
27.7%
Bachelor's or higher

Age distribution

Male Female
83
Under 5
97
115
5–9
136
130
10–14
152
106
15–19
124
71
20–24
84
171
25–34
200
242
35–44
285
128
45–54
151
109
55–59
129
96
60–64
112
137
65–74
160
105
75–84
124
38
85+
45
← Male
Female →

Age summary

GroupCount%
Under 1885425.6%
18 and over2,47674.4%
65 and over60918.3%
Median age37.5 years

Race & ethnicity

White 96%
Hispanic or Latino 1.6%
Two or more races 0.9%
Other race 0.9%
Asian 0.5%
Black or African American 0.2%
GroupCount%
White3,24796%
Hispanic or Latino531.6%
Two or more races310.9%
Other race290.9%
Asian170.5%
Black or African American60.2%

Household income

Income range This ZIP County avg State avg
Under $50k 30.6% 32.5% 40.1%
$50k – $100k 42.0% 38.6% 33.4%
$100k – $200k 21.9% 22.8% 21.5%
Over $200k 5.5% 6.2% 5.0%
Under $10k 2.4%
$10k–$15k 4.2%
$15k–$25k 8.0%
$25k–$35k 4.9%
$35k–$50k 6.1%
$50k–$75k 16.9%
$75k–$100k 24.5%
$100k–$150k 17.5%
$150k–$200k 10.7%
$200k+ 4.8%
Range% of households
Under $10k2.4%
$10k–$15k4.2%
$15k–$25k8.0%
$25k–$35k4.9%
$35k–$50k6.1%
$50k–$75k16.9%
$75k–$100k24.5%
$100k–$150k17.5%
$150k–$200k10.7%
$200k+4.8%
Median income$81,446

Housing

Home values

Under $50k 5.1%
$50k–$100k 15.2%
$100k–$150k 25.7%
$150k–$200k 24.9%
$200k–$300k 15.7%
$300k–$500k 11.4%
$500k–$1M 1.0%
$1M+ 1.0%

Housing overview

MetricValue
Median home value$157,100
Median rent / month$644
Owner occupied80.8%
Renter occupied19.2%
Vacant4.7%
Single-family detached87.5%
Large apartment buildings1.3%
Mobile homes1.0%
Median rooms6.6
Avg household size (owned)2.63

Year built

Era%
2020 or later0.1%
2010–20194.1%
2000–20095.9%
1990–19995.9%
1980–19893.4%
1970–197917.7%
1960–19698.8%
1950–195913.6%
1940–19498.3%
1939 or earlier32.3%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom7.9%
2 bedrooms19.1%
3 bedrooms43.6%
4 bedrooms23.4%
5+ bedrooms6.0%

Vehicles per household

Vehicles% of households
No vehicle2.9%
1 vehicle23.7%
2 vehicles44.2%
3 or more29.2%

Heating fuel

Fuel type%
Utility gas67.8%
Electricity15.1%
Propane / LP gas14.0%
Fuel oil1.4%
Wood1.2%

Households & families

Household typeCount%
Married-couple family69053.1%
Cohabiting couple1259.6%
Male householder, no spouse14711.3%
Female householder, no spouse33826.0%
Households with children under 1845535.0%
Households with seniors (65+)42832.9%
Average household size2.50

Marital status

StatusMaleFemale
Never married30.2%26.7%
Married57.6%51.5%
Separated1.4%1.2%
Widowed1.1%10.3%
Divorced9.7%10.2%

Education

Less than 9th grade 1.6%
Some HS, no diploma 4.0%
HS graduate 35.3%
Some college, no degree 16.9%
Associate's degree 14.4%
Bachelor's degree 22.1%
Graduate / professional 5.6%
Metric%
HS diploma or higher94.4%
Bachelor's or higher27.7%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool768.7%
Kindergarten495.6%
Elementary school42548.9%
High school22926.3%
College / grad school9110.5%

Employment

Industry of employment

Education & healthcare 28.0%
Manufacturing 15.4%
Construction 11.1%
Agriculture & mining 9.9%
Retail trade 7.8%
Other services 5.5%
Arts, food & hospitality 5.3%
Professional & management 4.1%
Transportation & utilities 4.0%
Finance & real estate 3.3%
Wholesale trade 2.7%
Public administration 1.9%
Information 0.9%

Occupation

Category%
Management, business & arts42.3%
Service10.8%
Sales & office14.9%
Natural resources & construction12.3%
Production & transportation19.7%

Employment type

Type%
Private sector85.2%
Government9.0%
Self-employed5.8%
Unpaid family workers0.0%

Commute

Method%
Drive alone81.7%
Carpool6.3%
Public transit0.0%
Walk2.5%
Work from home9.6%
Other means0.0%
Avg commute (minutes)22.7

Poverty

All people 8.2%
Under 18 years 11.6%
18 and over 7.1%
Married-couple families 2.0%
Female-led households 32.3%

Income support

Source% of households
Social Security35.9%
Retirement income26.3%
Supplemental Security3.3%
Cash public assistance0.8%
Food stamps / SNAP6.8%

Health indicators

Condition%
Obesity35.1%
High blood pressure35.7%
High cholesterol35.8%
Diabetes9.8%
Heart disease7.3%
Stroke3.2%
Asthma8.8%
Arthritis26.8%
Kidney disease3.1%
Pulmonary disease6.7%
Cancer8.7%
Behavior / access%
Smoking14.7%
Binge drinking19.7%
No physical activity22.7%
Less than 7 hrs sleep28.7%
Depression16.7%
Fair or poor health12.0%
Poor mental health12.3%
Poor physical health9.3%
No health insurance8.4%
Visited doctor (checkup)77.2%
Visited dentist67.2%
Cholesterol screening90.2%
Teeth loss11.9%

Veterans & disability

VeteransCount%
Civilian veterans1154.6%
Disability%
Any disability8.7%
Under 182.6%
18–64 years7.8%
65 and over20.4%

Health insurance coverage

Type%
Private insurance77.6%
Public insurance30.7%
No insurance3.2%
Uninsured under 191.1%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only3,15094.6%
Spanish210.7%
Other Indo-European00.0%
Asian & Pacific Islander110.3%
Other languages100.3%

Place of birth & citizenship

OriginCount%
Native born (US)3,30299.2%
Born in same state3,27098.2%
Born in different state2,84285.3%
Foreign born321.0%
Naturalized citizen280.8%
Not a US citizen517.9%

Ancestry

AncestryCount%
Arab3289.8%
Italian2868.6%
French2758.3%
AncestryCount%
Polish1805.4%
English972.9%
Dutch90.3%

Technology access

Metric% of households
Computer access39.0%
Internet access88.6%

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

Frequently asked questions about ZIP code 50638

What city is ZIP code 50638 in?

ZIP code 50638 is primarily assigned to Grundy Center, Iowa.

What county is ZIP code 50638 in?

ZIP code 50638 falls within Grundy County, Iowa.

Is ZIP code 50638 mostly owner-occupied?

81% of occupied units in ZIP code 50638 are owner-occupied, well above the national average.

Does ZIP code 50638 have a large retiree population?

36% of households in ZIP code 50638 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 50638?

The median home value in ZIP code 50638 is $157,100.

What is the population of ZIP code 50638?

ZIP code 50638 has an estimated population of 3,330 residents, with a density of 35 people per square mile.

What timezone is ZIP code 50638 in?

ZIP code 50638 observes the CST timezone.

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