Residential delivery area · Iowa
ZIP Code 50638: Grundy Center, IA
ZIP code 50638 uses the postal name Grundy Center, Iowa and lies entirely in Grundy County (Census 2020 ZIP-county file). About 3,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $85,223 (Census Bureau, ACS 2020-2024). By Census place, 3% of its land lies in Grundy Center; 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Grundy Center · its only residential ZIP
- County
- Grundy County
- Census places
- Grundy Center
- Metro area
- Waterloo-Cedar Falls, IA
- House district
- IA-2 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 94.0 sq mi · 37 people per sq mi
Where is ZIP code 50638?
50638 centers on 42.357°, -92.795° and covers 94.0 square miles of land. It borders 8 ZIP codes: 50642, 50680, 50609, 50669, 50621, 50624, 50635, 50627.
The map draws ZIP code areas only. For the streets inside 50638, 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 50638 compare with the rest of Grundy County?
| Measure | 50638 | In Grundy County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 3,441 | 2nd of 17 | 182nd of 970 |
| Median household income | $85k | 5th of 12 | 132nd of 396 |
| Median home value | $185k | 7th of 11 | 218th of 423 |
Its median household income is higher than in 68% of U.S. residential ZIP codes, and it is denser than 36% 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 50638?
The 2020 Census counted 3,411 people in 50638; the ACS, which samples households over 2020-2024, estimates 3,441. Between the 2010 and 2020 censuses its population grew 3.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,441
- 2020 Census count
- 3,411+3.0% since 2010 (3,313)
- Households
- 1,361
- Median age
- 38.4
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 50638?
Of the 3,441 people the ACS estimates in 50638, 24.9% are under 18 and 18.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (95.6%).
- Under 1824.9%
- 18 to 6456.6%
- 65 and older18.5%
- White, not Hispanic95.6%
- Hispanic or Latino2.2%
- Other or two or more1.8%
- Black, not Hispanic0.2%
- Asian, not Hispanic0.1%
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 50638 earn?
Median household income is $85,223 (ACS 2020-2024), the 5th highest of the 12 ranked ZIP codes in Grundy County. It is not measurably different from 2015-2019 ($81,720 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $85,223±$15,043
- Income per person
- $41,853
- Below the poverty line
- 9.1%
- Unemployed (of the labor force)
- 1.2%
- Adults 25+ with a bachelor's degree
- 26.7%
- Adjusted gross income per tax return, 2022
- $83,9911,510 returns; wages 58% 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 50638?
FHFA's house price index for 50638, built from repeat sales and appraisals of the same homes, rose 98% from 2015 to 2025 and rose 43% from 2020 to 2025, and moved +2.4% in 2025.
- Median home value (owners' estimate)
- $185,200
- Median gross rent
- –
- Homes owned by their occupants
- 81.9%
- Housing units
- 1,414
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 50638?
114 business establishments had a location in this ZIP code in 2023, 10 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance19
- Construction13
- Retail trade12
- Accommodation and food services12
- Other services (except public administration)12
- Finance and insurance11
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 50638?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 50642 | Holland | 577 | $109k | 5.8 mi |
| 50680 | Wellsburg | 1,027 | $76k | 8.7 mi |
| 50609 | Beaman | 377 | $90k | 8.9 mi |
| 50669 | Reinbeck | 2,439 | $82k | 9.3 mi |
| 50621 | Conrad | 1,601 | $88k | 9.9 mi |
| 50624 | Dike | 1,855 | $97k | 10.4 mi |
| 50635 | Gladbrook | 1,423 | $81k | 11.8 mi |
| 50627 | Eldora | 3,276 | $75k | 15.3 mi |
| 50657 | Morrison | 96 | $66k | 6.2 mi (near) |
| 50652 | Lincoln | 113 | $65k | 8.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.