Grundy Center ZIP Code List — Grundy County, IA

There is one unique ZIP code in Grundy Center, Iowa and it is 50638. Area code: 319.

ZIP codes

93.98

sq mi land

0.00

sq mi water

319

area code

Grundy Center, IA ZIP code map

About Grundy Center, IA

Grundy Center, Iowa, is a charming small city that serves as the county seat of Grundy County. Known for its friendly community and vibrant local culture, it provides a welcoming atmosphere for both residents and visitors. The city combines the tranquility of rural life with essential amenities and community events that strengthen its bonds.

Location & geography

Grundy Center is located in the northeastern part of Iowa, surrounded by beautiful landscapes and farmland. It is approximately 50 miles southwest of Cedar Rapids and 35 miles north of Waterloo, making it accessible to larger urban areas while maintaining its quaint feel. The city spans a land area of 93.98 square miles with no designated water areas, highlighting its primarily terrestrial terrain.

Community & economy

The character of Grundy Center reflects close-knit community values, where residents take pride in their hometown. The local economy is supported by various industries, including agriculture, manufacturing, and retail, fostering a diverse job market. Daily life in Grundy Center is filled with community events, recreational activities, and a strong emphasis on family-friendly gatherings.

Transportation

Grundy Center is conveniently located near several major highways, including U.S. Route 20 and Iowa State Route 14, providing easy access to neighboring towns and cities. The nearest major airport is Waterloo Regional Airport, located about 30 miles to the south, servicing both domestic and regional flights. Public transit options may be limited, making personal vehicles a primary mode of transportation for residents.

History

Grundy Center was established in the mid-19th century and has since served as a hub for agriculture and commerce within Grundy County. Historically, the town has focused on key industries such as farming and manufacturing, which have shaped its economic landscape. Notable events in the city’s history include annual community festivals that celebrate local heritage and foster community spirit.

Did you know?

One surprising fact about Grundy Center is that it hosts the annual Grundy County Corn Carnival, a beloved event that celebrates the local agricultural heritage and attracts visitors from surrounding areas. The city is also known for its unique downtown architecture, showcasing a blend of historical and modern designs.

ZIP codes for Grundy Center, IA (1)

ZIP code	City	County	Map
50638	Grundy Center	Grundy	View map

Demographics & statistics

3,330

Population

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

Under 5

115

5–9

136

130

10–14

152

106

15–19

124

20–24

171

25–34

200

242

35–44

285

128

45–54

151

109

55–59

129

60–64

112

137

65–74

160

105

75–84

124

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	854	25.6%
18 and over	2,476	74.4%
65 and over	609	18.3%
Median age	37.5 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%

Group	Count	%
White	3,247	96%
Hispanic or Latino	53	1.6%
Two or more races	31	0.9%
Other race	29	0.9%
Asian	17	0.5%
Black or African American	6	0.2%

Household income

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 $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%
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

Metric	Value
Median home value	$157,100
Median rent / month	$644
Owner occupied	80.8%
Renter occupied	19.2%
Vacant	4.7%
Single-family detached	87.5%
Large apartment buildings	1.3%
Mobile homes	1.0%
Median rooms	6.6
Avg household size (owned)	2.63

Year built

Era	%
2020 or later	0.1%
2010–2019	4.1%
2000–2009	5.9%
1990–1999	5.9%
1980–1989	3.4%
1970–1979	17.7%
1960–1969	8.8%
1950–1959	13.6%
1940–1949	8.3%
1939 or earlier	32.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	7.9%
2 bedrooms	19.1%
3 bedrooms	43.6%
4 bedrooms	23.4%
5+ bedrooms	6.0%

Vehicles per household

Vehicles	% of households
No vehicle	2.9%
1 vehicle	23.7%
2 vehicles	44.2%
3 or more	29.2%

Heating fuel

Fuel type	%
Utility gas	67.8%
Electricity	15.1%
Propane / LP gas	14.0%
Fuel oil	1.4%
Wood	1.2%

Households & families

Household type	Count	%
Married-couple family	690	53.1%
Cohabiting couple	125	9.6%
Male householder, no spouse	147	11.3%
Female householder, no spouse	338	26.0%
Households with children under 18	455	35.0%
Households with seniors (65+)	428	32.9%
Average household size	2.50

Marital status

Status	Male	Female
Never married	30.2%	26.7%
Married	57.6%	51.5%
Separated	1.4%	1.2%
Widowed	1.1%	10.3%
Divorced	9.7%	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 higher	94.4%
Bachelor's or higher	27.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	76	8.7%
Kindergarten	49	5.6%
Elementary school	425	48.9%
High school	229	26.3%
College / grad school	91	10.5%

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 & arts	42.3%
Service	10.8%
Sales & office	14.9%
Natural resources & construction	12.3%
Production & transportation	19.7%

Employment type

Type	%
Private sector	85.2%
Government	9.0%
Self-employed	5.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	81.7%
Carpool	6.3%
Public transit	0.0%
Walk	2.5%
Other means	0.0%
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 Security	35.9%
Retirement income	26.3%
Supplemental Security	3.3%
Cash public assistance	0.8%
Food stamps / SNAP	6.8%

Health indicators

Condition	%
High blood pressure	35.7%
High cholesterol	35.8%
Heart disease	7.3%
Stroke	3.2%
Asthma	8.8%
Arthritis	26.8%
Kidney disease	3.1%
Pulmonary disease	6.7%
Cancer	8.7%

Behavior / access	%
Binge drinking	19.7%
No physical activity	22.7%
Less than 7 hrs sleep	28.7%
Fair or poor health	12.0%
Poor mental health	12.3%
Poor physical health	9.3%
No health insurance	8.4%
Visited doctor (checkup)	77.2%
Visited dentist	67.2%
Cholesterol screening	90.2%
Teeth loss	11.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	115	4.6%

Disability	%
Any disability	8.7%
Under 18	2.6%
18–64 years	7.8%
65 and over	20.4%

Health insurance coverage

Type	%
Private insurance	77.6%
Public insurance	30.7%
Uninsured under 19	1.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,150	94.6%
Spanish	21	0.7%
Other Indo-European	0	0.0%
Asian & Pacific Islander	11	0.3%
Other languages	10	0.3%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,302	99.2%
Born in same state	3,270	98.2%
Born in different state	2,842	85.3%
Foreign born	32	1.0%
Naturalized citizen	28	0.8%
Not a US citizen	5	17.9%

Ancestry

Ancestry	Count	%
Arab	328	9.8%
Italian	286	8.6%
French	275	8.3%

Ancestry	Count	%
Polish	180	5.4%
English	97	2.9%
Dutch	9	0.3%

Technology access

Metric	% of households
Computer access	39.0%
Internet access	88.6%

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

Frequently asked questions

What is the ZIP code for Grundy Center, IA?

Grundy Center, IA has one ZIP code: 50638.

What is the main ZIP code for Grundy Center, IA?

The primary ZIP code for Grundy Center, IA is 50638. The city uses area code 319 for phone service.

What county is Grundy Center, IA in?

Grundy Center is located in Grundy County, Iowa.

How many ZIP codes are in Grundy Center, IA?

Grundy Center, IA has 1 ZIP code.

What is the ZIP code for downtown Grundy Center and the surrounding business district?

Downtown Grundy Center and its central business district are located in ZIP code 50638, which serves as the primary commercial hub for the city.

What ZIP code covers Grundy Center High School and the main residential areas of the city?

Grundy Center High School and the majority of residential neighborhoods in Grundy Center are served by ZIP code 50638, which encompasses the entire city.