50112 ZIP Code — Grinnell, IA

Poweshiek County, Iowa

ZIP code 50112 is located in Grinnell, Iowa, within Poweshiek County. It covers approximately 182.21 square miles and serves a population of 11,827 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 641.

About ZIP code 50112

The housing stock consists of a mix of housing types. Most homes were built in the pre-1940, giving the area an established character. Median home value is $188,400. Owner-occupancy sits near the national average at 69%.

The gap between median ($61,467) and mean household income suggests income inequality — a small number of higher earners pull the average up. 43% 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 15 minutes is near the national average.

Educational attainment is near the national average, with 37% of residents holding a bachelor's degree or higher.

11,827

population

182.21

sq mi land

Standard

ZIP type

Central (CT)

timezone

50112 ZIP code map

Cities in ZIP code 50112

Below are the cities the US Postal Service accepts for ZIP code 50112. Using any city not on this list may result in mail delivery delays.

City	Status
Grinnell	Acceptable
Grinnell	Preferred

Nearby ZIP codes

50157 Malcom (8.3 mi) 50135 Kellogg (8.8 mi) 50153 Lynnville (11.6 mi) 50106 Gilman (12.3 mi) 50137 Killduff (12.4 mi) 50171 Montezuma (12.9 mi) 50251 Sully (13.7 mi) 52211 Brooklyn (14.3 mi) 52339 Tama (15.4 mi) 50208 Newton (16.6 mi) 50141 Laurel (16.6 mi) 50173 Montour (17.2 mi)

Demographics updated 05/2026

Population
Total population	11,827
Population density	65 / sq mi
State FIPS	19
County FIPS	157

Geography
Land area	182.21 sq mi
Water area	0.27 sq mi
Latitude	41.7218
Longitude	-92.7178
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	44.4%	43.9%	40.1%
$50k – $100k	27.6%	31.0%	33.4%
$100k – $200k	19.1%	18.3%	21.5%
Over $200k	8.9%	6.8%	5.0%

Demographics & statistics

11,827

Population

People per sq mi

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

Income range	This ZIP	County avg	State avg
Under $50k	44.4%	43.9%	40.1%
$50k – $100k	27.6%	31.0%	33.4%
$100k – $200k	19.1%	18.3%	21.5%
Over $200k	8.9%	6.8%	5.0%

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%
Work from home	11.8%
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	%
Obesity	34.5%
High blood pressure	31.1%
High cholesterol	32.0%
Diabetes	9.3%
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	%
Smoking	15.2%
Binge drinking	21.0%
No physical activity	22.6%
Less than 7 hrs sleep	30.5%
Depression	18.2%
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%
No insurance	3.6%
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 about ZIP code 50112

What city is ZIP code 50112 in?

ZIP code 50112 is primarily assigned to Grinnell, Iowa.

What county is ZIP code 50112 in?

ZIP code 50112 falls within Poweshiek County, Iowa.

Does ZIP code 50112 have a large retiree population?

43% of households in ZIP code 50112 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 50112?

The median home value in ZIP code 50112 is $188,400.

What is the population of ZIP code 50112?

ZIP code 50112 has an estimated population of 11,827 residents, with a density of 65 people per square mile.

What is the median household income in ZIP code 50112?

The median household income in ZIP code 50112 is $61,467, below the national median of ~$75,000.

What timezone is ZIP code 50112 in?

ZIP code 50112 observes the CST timezone.