Residential delivery area · Iowa
ZIP Code 51346: Hartley, IA
ZIP code 51346 uses the postal name Hartley, Iowa and lies mostly in O'Brien County (71% of its land), reaching into Osceola County and Clay County (Census 2020 ZIP-county file). About 2,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $72,426 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Hartley; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Hartley · its only residential ZIP
- County
- O'Brien County (71%); Osceola County (20%); Clay County (8%)
- Census places
- Hartley
- House district
- IA-4 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 146.2 sq mi · 15 people per sq mi
Where is ZIP code 51346?
51346 centers on 43.191°, -95.454° and covers 146.2 square miles of land plus 0.0 of water. It borders 8 ZIP codes: 51338, 51248, 51245, 51350, 51357, 51058, 51354, 51345.
The map draws ZIP code areas only. For the streets inside 51346, 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 51346 compare with the rest of O'Brien County?
| Measure | 51346 | In O'Brien County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 2,247 | 2nd of 14 | 255th of 970 |
| Median household income | $72k | 2nd of 5 | 244th of 396 |
| Median home value | $157k | 5th of 6 | 305th of 423 |
Its median household income is higher than in 51% of U.S. residential ZIP codes, and it is denser than 22% 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 51346?
The 2020 Census counted 2,343 people in 51346; the ACS, which samples households over 2020-2024, estimates 2,247. Between the 2010 and 2020 censuses its population fell 4.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,247
- 2020 Census count
- 2,343−4.4% since 2010 (2,451)
- Households
- 963
- Median age
- 44.2
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 51346?
Of the 2,247 people the ACS estimates in 51346, 18.2% are under 18 and 23.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (93.1%).
- Under 1818.2%
- 18 to 6458.0%
- 65 and older23.8%
- White, not Hispanic93.1%
- Hispanic or Latino4.0%
- Other or two or more2.6%
- Black, not Hispanic0.2%
- Asian, not Hispanic0.0%
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 51346 earn?
Median household income is $72,426 (ACS 2020-2024), the 2nd highest of the 5 ranked ZIP codes in O'Brien County. It rose from $56,540 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $72,426±$8,772
- Income per person
- $36,968
- Below the poverty line
- 9.1%
- Unemployed (of the labor force)
- 3.8%
- Adults 25+ with a bachelor's degree
- 21.9%
- Adjusted gross income per tax return, 2022
- $74,9101,050 returns; wages 60% 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 51346?
FHFA's house price index for 51346, built from repeat sales and appraisals of the same homes, rose 69% from 2015 to 2025 and rose 43% from 2020 to 2025.
- Median home value (owners' estimate)
- $156,800
- Median gross rent
- $750
- Homes owned by their occupants
- 82.7%
- Housing units
- 1,064
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 51346?
76 business establishments had a location in this ZIP code in 2023, 4 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction12
- Transportation and warehousing11
- Other services (except public administration)11
- Retail trade9
- Wholesale trade8
- Health care and social assistance6
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 51346?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 51338 | Everly | 852 | $58k | 6.9 mi |
| 51248 | Sanborn | 1,534 | $64k | 10.4 mi |
| 51245 | Primghar | 1,377 | $70k | 10.8 mi |
| 51350 | Melvin | 383 | $77k | 10.8 mi |
| 51357 | Royal | 910 | $68k | 12.2 mi |
| 51058 | Sutherland | 1,096 | $63k | 14.0 mi |
| 51354 | Ocheyedan | 965 | $73k | 15.9 mi |
| 51345 | Harris | 347 | $54k | 16.0 mi |
| 51340 | Fostoria | 75 | $90k | 15.4 mi (near) |
| 51301 | Spencer | 12,638 | $63k | 15.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.