Residential delivery area · Iowa
ZIP Code 50112: Grinnell, IA
ZIP code 50112 uses the postal name Grinnell, Iowa and lies mostly in Poweshiek County (74% of its land) with the rest in Jasper County (Census 2020 ZIP-county file). About 12,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $67,078 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Grinnell (3%) and Oakland Acres (under 1%); 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Grinnell · its only residential ZIP
- County
- Poweshiek County (74%); Jasper County (26%)
- Census places
- Grinnell (3%); Oakland Acres (under 1%)
- House districts
- IA-2 (74%), IA-1 (26%) 119th Congress, by share of land
- State
- Iowa
- Time zone
- Central
- Land area
- 182.2 sq mi · 65 people per sq mi
Where is ZIP code 50112?
50112 centers on 41.733°, -92.713° and covers 182.2 square miles of land plus 0.3 of water. It borders 7 ZIP codes: 50157, 50135, 50106, 50242, 50153, 50171, 52339.
The map draws ZIP code areas only. For the streets inside 50112, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 50112 compare with the rest of Poweshiek County?
| Measure | 50112 | In Poweshiek County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 11,862 | 1st of 16 | 71st of 970 |
| Median household income | $67k | 7th of 8 | 293rd of 396 |
| Median home value | $215k | 2nd of 8 | 148th of 423 |
Its median household income is higher than in 42% of U.S. residential ZIP codes, and it is denser than 47% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 50112?
The 2020 Census counted 11,849 people in 50112; the ACS, which samples households over 2020-2024, estimates 11,862. Between the 2010 and 2020 censuses its population grew 2.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 11,862
- 2020 Census count
- 11,849+2.7% since 2010 (11,536)
- Households
- 4,671
- Median age
- 38.5
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 50112?
Of the 11,862 people the ACS estimates in 50112, 18.2% are under 18 and 21.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (87.9%).
- Under 1818.2%
- 18 to 6460.6%
- 65 and older21.2%
- White, not Hispanic87.9%
- Other or two or more4.4%
- Asian, not Hispanic3.1%
- Hispanic or Latino2.8%
- Black, not Hispanic1.8%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 50112 earn?
Median household income is $67,078 (ACS 2020-2024), the 7th highest of the 8 ranked ZIP codes in Poweshiek County. It is not measurably different from 2015-2019 ($64,310 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $67,078±$7,862
- Income per person
- $37,893
- Below the poverty line
- 9.1%
- Unemployed (of the labor force)
- 4.0%
- Adults 25+ with a bachelor's degree
- 35.0%
- Adjusted gross income per tax return, 2022
- $78,3054,790 returns; wages 64% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 50112?
FHFA's house price index for 50112, built from repeat sales and appraisals of the same homes, rose 59% from 2015 to 2025 and rose 42% from 2020 to 2025, and moved +10.7% in 2025.
- Median home value (owners' estimate)
- $214,900
- Median gross rent
- $894
- Homes owned by their occupants
- 68.7%
- Housing units
- 5,025
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 50112?
338 business establishments had a location in this ZIP code in 2023, 10 fewer than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance57
- Retail trade44
- Professional, scientific, and technical services36
- Accommodation and food services32
- Other services (except public administration)28
- Finance and insurance27
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 50112?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 50157 | Malcom | 473 | $115k | 7.7 mi |
| 50135 | Kellogg | 1,754 | $65k | 9.5 mi |
| 50106 | Gilman | 1,163 | $101k | 11.3 mi |
| 50242 | Searsboro | 326 | $67k | 11.9 mi |
| 50153 | Lynnville | 890 | $74k | 12.0 mi |
| 50171 | Montezuma | 2,524 | $65k | 14.1 mi |
| 52339 | Tama | 4,326 | $68k | 14.9 mi |
| 52211 | Brooklyn | 2,795 | $74k | 13.6 mi (near) |
| 50137 | Killduff | 114 | – | 13.8 mi (near) |
| 50251 | Sully | 1,365 | $91k | 14.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.