Grinnell ZIP Codes — Poweshiek County, IA

There is one unique ZIP code in Grinnell, Iowa and it is 50112. Area code: 641.

ZIP codes

182.21

sq mi land

0.27

sq mi water

641

area code

Grinnell, IA ZIP code map

About Grinnell, IA

Grinnell, Iowa, is a charming city located in Poweshiek County. Known for its rich history and vibrant community, Grinnell offers a unique blend of Midwestern charm and modern amenities. The city is an educational hub, primarily due to the presence of Grinnell College, which attracts students and visitors alike.

Location & geography

Grinnell is situated in central Iowa, providing easy access to various neighboring cities. Notable nearby locations include Newton, which is approximately 23 miles to the southeast; Marshalltown, about 24 miles to the north; and Iowa City, roughly 52 miles to the east. The city spans a total land area of 182.21 square miles, with a small water area of 0.27 square miles, featuring a mix of flat terrain and gentle rolling hills.

Community & economy

The character of Grinnell is defined by its friendly residents and a strong sense of community spirit. The local economy is diverse, with industries ranging from education and healthcare to retail and agribusiness, fostering a stable environment for daily life. Residents enjoy a variety of recreational activities, local events, and vibrant cultural offerings, creating a welcoming atmosphere for families and visitors.

Transportation

Grinnell is easily accessible via major highways, including Interstate 80, which runs north of the city, providing vital connections to larger metropolitan areas. The nearest named airports include the Des Moines International Airport, located approximately 60 miles to the west, and the Waterloo Regional Airport, situated about 75 miles to the northeast. Public transit options are limited, but local services and taxis are available.

History

Grinnell was founded in the 1850s and has a rich history associated with the railroad and agriculture that contributed to its early growth. The city became known for its progressive community efforts and played a key role in educational advancements, largely due to the establishment of Grinnell College. Significant events in the city's history include its response to natural disasters and its initiatives in urban development.

Did you know?

A surprising fact about Grinnell is that it is home to the Grinnell Mutual Reinsurance Company, one of the largest mutual insurance companies in the Midwest. Additionally, Grinnell is recognized for its historic downtown area, which features beautifully preserved architecture and local shops.

ZIP codes for Grinnell, IA (1)

ZIP code	City	County	Map
50112	Grinnell	Poweshiek	View map

Demographics & statistics

11,827

Population

40.1

Median age

$61,467

Median household income

$38,803

Per capita income

$188,400

Median home value

$841

Median monthly rent

69.3%

Home ownership

8.8%

Poverty rate

3.3%

Unemployment

3,557

Housing units

37.3%

Bachelor's or higher

Age distribution

Male Female

224

Under 5

256

295

5–9

339

309

10–14

355

787

15–19

903

436

20–24

501

394

25–34

452

643

35–44

737

614

45–54

705

259

55–59

297

410

60–64

470

560

65–74

643

398

75–84

456

179

85+

205

← Male

Female →

Age summary

Group	Count	%
Under 18	2,320	19.6%
18 and over	9,507	80.4%
65 and over	2,441	20.6%
Median age	40.1 years

Race & ethnicity

White 89.3%

Asian 3.5%

Two or more races 3%

Black or African American 1.8%

Hispanic or Latino 1.6%

Other race 0.9%

Group	Count	%
White	10,735	89.3%
Asian	416	3.5%
Two or more races	361	3%
Black or African American	211	1.8%
Hispanic or Latino	195	1.6%
Other race	104	0.9%

Household income

Under $10k 5.8%

$10k–$15k 4.4%

$15k–$25k 9.4%

$25k–$35k 7.3%

$35k–$50k 14.0%

$50k–$75k 16.8%

$75k–$100k 9.6%

$100k–$150k 17.3%

$150k–$200k 5.4%

$200k+ 10.1%

Range	% of households
Under $10k	5.8%
$10k–$15k	4.4%
$15k–$25k	9.4%
$25k–$35k	7.3%
$35k–$50k	14.0%
$50k–$75k	16.8%
$75k–$100k	9.6%
$100k–$150k	17.3%
$150k–$200k	5.4%
$200k+	10.1%
Median income	$61,467

Housing

Home values

Under $50k 5.4%

$50k–$100k 12.6%

$100k–$150k 15.8%

$150k–$200k 20.2%

$200k–$300k 28.2%

$300k–$500k 13.4%

$500k–$1M 3.6%

$1M+ 0.8%

Housing overview

Metric	Value
Median home value	$188,400
Median rent / month	$841
Owner occupied	69.3%
Renter occupied	30.7%
Vacant	5.4%
Single-family detached	68.1%
Large apartment buildings	6.8%
Mobile homes	2.8%
Median rooms	6.2
Avg household size (owned)	2.45

Year built

Era	%
2020 or later	0.0%
2010–2019	6.0%
2000–2009	8.9%
1990–1999	7.9%
1980–1989	12.6%
1970–1979	16.8%
1960–1969	6.3%
1950–1959	9.5%
1940–1949	5.1%
1939 or earlier	26.9%

Bedrooms

Size	% of units
No bedroom (studio)	1.4%
1 bedroom	10.2%
2 bedrooms	33.2%
3 bedrooms	30.9%
4 bedrooms	19.6%
5+ bedrooms	4.7%

Vehicles per household

Vehicles	% of households
No vehicle	11.5%
1 vehicle	30.0%
2 vehicles	34.0%
3 or more	24.5%

Heating fuel

Fuel type	%
Utility gas	47.8%
Electricity	32.6%
Propane / LP gas	15.7%
Fuel oil	0.2%
Wood	0.2%
Solar	0.1%
No fuel used	3.1%

Households & families

Household type	Count	%
Married-couple family	2,189	46.1%
Cohabiting couple	352	7.4%
Male householder, no spouse	940	19.8%
Female householder, no spouse	1,263	26.6%
Households with children under 18	1,113	23.5%
Households with seniors (65+)	1,826	38.5%
Average household size	2.17

Marital status

Status	Male	Female
Never married	37.5%	35.5%
Married	47.9%	41.1%
Separated	0.4%	0.3%
Widowed	3.0%	13.0%
Divorced	11.2%	10.2%

Education

Less than 9th grade 2.8%

Some HS, no diploma 1.7%

HS graduate 34.2%

Some college, no degree 15.3%

Associate's degree 8.6%

Bachelor's degree 18.9%

Graduate / professional 18.5%

Metric	%
HS diploma or higher	95.5%
Bachelor's or higher	37.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	110	3.0%
Kindergarten	137	3.7%
Elementary school	977	26.4%
High school	754	20.4%
College / grad school	1,716	46.5%

Employment

Industry of employment

Education & healthcare 39.7%

Manufacturing 12.0%

Retail trade 10.8%

Arts, food & hospitality 9.4%

Professional & management 6.8%

Finance & real estate 5.3%

Agriculture & mining 3.8%

Transportation & utilities 3.2%

Construction 3.1%

Other services 2.6%

Public administration 2.3%

Wholesale trade 0.8%

Information 0.2%

Occupation

Category	%
Management, business & arts	42.1%
Service	16.4%
Sales & office	20.2%
Natural resources & construction	8.5%
Production & transportation	12.8%

Employment type

Type	%
Private sector	77.7%
Government	13.3%
Self-employed	8.9%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	64.4%
Carpool	5.1%
Public transit	0.0%
Walk	14.4%
Other means	4.3%
Avg commute (minutes)	15.4

Poverty

All people 8.8%

Under 18 years 2.6%

18 and over 10.6%

Married-couple families 1.7%

Female-led households 34.4%

Income support

Source	% of households
Social Security	42.5%
Retirement income	25.2%
Supplemental Security	3.3%
Cash public assistance	3.0%
Food stamps / SNAP	10.8%

Health indicators

Condition	%
High blood pressure	31.1%
High cholesterol	32.0%
Heart disease	6.6%
Stroke	3.0%
Asthma	9.5%
Arthritis	24.1%
Kidney disease	2.9%
Pulmonary disease	6.4%
Cancer	7.0%

Behavior / access	%
Binge drinking	21.0%
No physical activity	22.6%
Less than 7 hrs sleep	30.5%
Fair or poor health	12.2%
Poor mental health	13.7%
Poor physical health	9.1%
No health insurance	8.9%
Visited doctor (checkup)	74.2%
Visited dentist	67.1%
Cholesterol screening	86.8%
Teeth loss	13.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	559	5.9%

Disability	%
Any disability	12.3%
Under 18	4.7%
18–64 years	8.3%
65 and over	32.6%

Health insurance coverage

Type	%
Private insurance	79.9%
Public insurance	33.0%
Uninsured under 19	1.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	11,347	95.9%
Spanish	142	1.3%
Other Indo-European	58	0.5%
Asian & Pacific Islander	63	0.6%
Other languages	12	0.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	11,324	95.7%
Born in same state	11,176	94.5%
Born in different state	7,742	65.5%
Foreign born	148	1.3%
Naturalized citizen	503	4.3%
Not a US citizen	108	21.5%

Ancestry

Ancestry	Count	%
Italian	1,615	13.7%
French	1,389	11.7%
English	967	8.2%

Ancestry	Count	%
Arab	605	5.1%
Polish	435	3.7%
Dutch	208	1.8%

Technology access

Metric	% of households
Computer access	40.1%
Internet access	92.7%

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

Frequently asked questions

What ZIP codes does Grinnell, IA have?

Grinnell, IA has one ZIP code: 50112. Each ZIP code serves a distinct delivery area within the city and surrounding region.