Residential delivery area · Iowa
ZIP Code 51442: Denison, IA
ZIP code 51442 uses the postal name Denison, Iowa and lies entirely in Crawford County (Census 2020 ZIP-county file). About 9,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $66,767 (Census Bureau, ACS 2020-2024). By Census place, 4% of its land lies in Denison; 96% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Denison · its only residential ZIP
- County
- Crawford County
- Census places
- Denison
- House district
- IA-4 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 159.6 sq mi · 61 people per sq mi
Where is ZIP code 51442?
51442 centers on 42.031°, -95.357° and covers 159.6 square miles of land plus 0.1 of water. It borders 9 ZIP codes: 51441, 51520, 51465, 51528, 51461, 51448, 51439, 51454, 51527.
The map draws ZIP code areas only. For the streets inside 51442, 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 51442 compare with the rest of Crawford County?
| Measure | 51442 | In Crawford County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 9,692 | 1st of 21 | 81st of 970 |
| Median household income | $67k | 4th of 6 | 298th of 396 |
| Median home value | $159k | 3rd of 6 | 298th of 423 |
Its median household income is higher than in 42% of U.S. residential ZIP codes, and it is denser than 46% 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 51442?
The 2020 Census counted 9,763 people in 51442; the ACS, which samples households over 2020-2024, estimates 9,692. Between the 2010 and 2020 censuses its population fell 0.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 9,692
- 2020 Census count
- 9,763−0.8% since 2010 (9,838)
- Households
- 3,587
- Median age
- 36.1
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 51442?
Of the 9,692 people the ACS estimates in 51442, 26.1% are under 18 and 14.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (47.5%), then Hispanic or Latino (42.7%).
- Under 1826.1%
- 18 to 6459.7%
- 65 and older14.3%
- White, not Hispanic47.5%
- Hispanic or Latino42.7%
- Other or two or more5.3%
- Asian, not Hispanic3.2%
- Black, not Hispanic1.3%
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 51442 earn?
Median household income is $66,767 (ACS 2020-2024), the 4th highest of the 6 ranked ZIP codes in Crawford County. It is not measurably different from 2015-2019 ($67,077 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $66,767±$9,035
- Income per person
- $31,469
- Below the poverty line
- 16.2%
- Unemployed (of the labor force)
- 4.9%
- Adults 25+ with a bachelor's degree
- 17.3%
- Adjusted gross income per tax return, 2022
- $67,7804,320 returns; wages 67% 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 51442?
FHFA's house price index for 51442, built from repeat sales and appraisals of the same homes, rose 44% from 2015 to 2025 and rose 37% from 2020 to 2025, and moved −1.0% in 2025.
- Median home value (owners' estimate)
- $159,400
- Median gross rent
- $755
- Homes owned by their occupants
- 73.2%
- Housing units
- 3,825
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 51442?
257 business establishments had a location in this ZIP code in 2023, the same count as in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade40
- Health care and social assistance30
- Accommodation and food services28
- Other services (except public administration)25
- Finance and insurance21
- Construction20
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 51442?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 51441 | Deloit | 468 | $49k | 6.1 mi |
| 51520 | Arion | 243 | $61k | 6.8 mi |
| 51465 | Vail | 689 | $73k | 8.9 mi |
| 51528 | Dow City | 674 | $63k | 11.2 mi |
| 51461 | Schleswig | 1,097 | $74k | 11.6 mi |
| 51448 | Kiron | 612 | $76k | 12.3 mi |
| 51439 | Charter Oak | 818 | $53k | 12.4 mi |
| 51454 | Manilla | 1,254 | $101k | 13.2 mi |
| 51527 | Defiance | 362 | $65k | 13.3 mi |
| 51460 | Ricketts | 61 | – | 13.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.