Residential delivery area · Iowa
ZIP Code 51249: Sibley, IA
ZIP code 51249 uses the postal name Sibley, Iowa and lies entirely in Osceola County (Census 2020 ZIP-county file). About 3,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $61,500 (Census Bureau, ACS 2020-2024). By Census place, 1% of its land lies in Sibley; 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Sibley · its only residential ZIP
- County
- Osceola County
- Census places
- Sibley
- House district
- IA-4 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 126.6 sq mi · 28 people per sq mi
Where is ZIP code 51249?
51249 centers on 43.407°, -95.731° and covers 126.6 square miles of land plus 0.0 of water. It borders 6 ZIP codes: 56117, 51243, 51232, 51354, 51350, 56168.
The map draws ZIP code areas only. For the streets inside 51249, 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 51249 compare with the rest of Osceola County?
| Measure | 51249 | In Osceola County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 3,564 | 1st of 8 | 175th of 970 |
| Median household income | $62k | not ranked | not ranked |
| Median home value | $161k | not ranked | not ranked |
51249's median household income is not ranked: its 90% margin of error (±$17,269) is more than a quarter of the figure ($61,500); 51249's median home value is not ranked: its 90% margin of error (±$62,470) is more than a quarter of the figure ($160,700). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 32% of 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 51249?
The 2020 Census counted 3,558 people in 51249; the ACS, which samples households over 2020-2024, estimates 3,564. Between the 2010 and 2020 censuses its population fell 1.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,564
- 2020 Census count
- 3,558−1.0% since 2010 (3,593)
- Households
- 1,458
- Median age
- 41.4
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 51249?
Of the 3,564 people the ACS estimates in 51249, 23.9% are under 18 and 20.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (81.6%), then Hispanic or Latino (13.2%).
- Under 1823.9%
- 18 to 6455.8%
- 65 and older20.3%
- White, not Hispanic81.6%
- Hispanic or Latino13.2%
- Other or two or more3.8%
- Asian, not Hispanic0.7%
- Black, not Hispanic0.6%
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 51249 earn?
Median household income is $61,500 (ACS 2020-2024). It is not measurably different from 2015-2019 ($73,970 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $61,500±$17,269
- Income per person
- $35,382
- Below the poverty line
- 22.5%
- Unemployed (of the labor force)
- 5.2%
- Adults 25+ with a bachelor's degree
- 21.2%
- Adjusted gross income per tax return, 2022
- $72,0811,560 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 51249?
FHFA's house price index for 51249, built from repeat sales and appraisals of the same homes, rose 89% from 2015 to 2025 and rose 85% from 2020 to 2025, and moved +30.3% in 2025.
- Median home value (owners' estimate)
- $160,700
- Median gross rent
- $774
- Homes owned by their occupants
- 77.9%
- Housing units
- 1,579
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 51249?
129 business establishments had a location in this ZIP code in 2023, 1 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade24
- Health care and social assistance16
- Construction13
- Transportation and warehousing13
- Other services (except public administration)12
- Finance and insurance10
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 51249?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 56117 | Bigelow, MN | 400 | $63k | 8.3 mi |
| 51243 | Little Rock | 735 | $84k | 8.6 mi |
| 51232 | Ashton | 658 | $83k | 8.7 mi |
| 51354 | Ocheyedan | 965 | $73k | 9.4 mi |
| 51350 | Melvin | 383 | $77k | 9.6 mi |
| 56168 | Rushmore, MN | 858 | $72k | 14.4 mi |
| 51237 | George | 1,605 | $62k | 14.4 mi (near) |
| 51248 | Sanborn | 1,534 | $64k | 14.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.