ZIP code · Osco · Illinois · United States
ZIP code 61274 — Osco
ZIP code 61274 serves Osco, Illinois.
- Postal code
- 61274Single source Value from one source, not cross-checked.
- City
- Osco
- County
- Henry FIPS 17073
- State
- Illinois
- Country
- United States
- Coordinates
- 41.3637, -90.2681 — precision precise (locality)
View on OpenStreetMap - Population
- 206 (ZCTA, ACS 5-year)
- Population density
- 9 / sq mi
- Land area
- 23.6 sq mi (61.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $97,656
- Per-capita income
- $39,297
- Median age
- 62.3
- Households
- 91
- Housing units
- 91
- Median home value
- $130,700
- Congressional district
- IL-16 (119th Congress)
- USDA hardiness zone
- 5b (-15 to -10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 309Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 61274 with another ZIP · ZIPs within 25 miles · distance from 61274
Map of ZIP code 61274
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 15°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 36 | 49 | 62 | 74 | 83 | 86 | 83 | 77 | 64 | 49 | 36 |
| Avg low °F | 15 | 19 | 29 | 40 | 52 | 62 | 65 | 63 | 55 | 43 | 31 | 21 |
| Precip in | 1.6 | 1.8 | 2.7 | 4.0 | 4.9 | 4.4 | 4.1 | 4.1 | 3.6 | 3.2 | 2.6 | 2.1 |
NOAA 1991–2020 climate normals from the nearest station: GENESEO (8.6 mi) · NOAA NCEI
Places in ZIP 61274
- 1 places of worship
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page