ZIP code · Hillsdale · Illinois · United States
ZIP code 61257 — Hillsdale
ZIP code 61257 serves Hillsdale, Illinois.
- Postal code
- 61257Single source Value from one source, not cross-checked.
- City
- Hillsdale
- County
- Rock Island FIPS 17161
- State
- Illinois
- Country
- United States
- Coordinates
- 41.5929, -90.2263 — precision precise (locality)
View on OpenStreetMap - Population
- 866 (ZCTA, ACS 5-year)
- Population density
- 21 / sq mi
- Land area
- 41.3 sq mi (106.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $62,000
- Per-capita income
- $42,205
- Median age
- 47.8
- Households
- 358
- Housing units
- 483
- Median home value
- $116,300
- Median gross rent
- $1,641 / month
- Congressional district
- IL-17 (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 61257 with another ZIP · ZIPs within 25 miles · distance from 61257
Map of ZIP code 61257
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 14°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 35 | 47 | 61 | 72 | 82 | 85 | 83 | 77 | 64 | 48 | 36 |
| Avg low °F | 14 | 18 | 28 | 40 | 52 | 62 | 66 | 64 | 56 | 44 | 31 | 21 |
| Precip in | 1.5 | 1.6 | 2.6 | 3.8 | 4.8 | 4.6 | 4.2 | 4.1 | 3.4 | 2.6 | 2.1 | 1.9 |
NOAA 1991–2020 climate normals from the nearest station: LE CLAIRE L&D 14 (9.1 mi) · NOAA NCEI
Places in ZIP 61257
- 1 restaurants & cafés
- 2 parks
- 1 libraries
- 1 gas stations
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