ZIP code · Thomson · Illinois · United States
ZIP code 61285 — Thomson
ZIP code 61285 serves Thomson, Illinois.
- Postal code
- 61285Single source Value from one source, not cross-checked.
- City
- Thomson
- County
- Carroll FIPS 17015
- State
- Illinois
- Country
- United States
- Coordinates
- 41.9816, -90.0844 — precision precise (locality)
View on OpenStreetMap - Population
- 2,687 (ZCTA, ACS 5-year)
- Population density
- 60 / sq mi
- Land area
- 44.4 sq mi (115.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $68,750
- Per-capita income
- $21,518
- Median age
- 42.1
- Households
- 738
- Housing units
- 998
- Median home value
- $165,200
- Median gross rent
- $832 / 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
- 815Telephone 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 61285 with another ZIP · ZIPs within 25 miles · distance from 61285
Map of ZIP code 61285
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 14°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 34 | 46 | 59 | 71 | 81 | 84 | 82 | 76 | 63 | 48 | 35 |
| Avg low °F | 14 | 17 | 28 | 40 | 51 | 62 | 65 | 63 | 55 | 43 | 31 | 21 |
| Precip in | 1.4 | 1.6 | 2.4 | 3.4 | 4.0 | 4.5 | 3.4 | 3.4 | 3.7 | 2.6 | 2.2 | 1.7 |
NOAA 1991–2020 climate normals from the nearest station: FULTON L&D #13 (6.8 mi) · NOAA NCEI
Places in ZIP 61285
- 1 schools
- 1 libraries
- 1 post offices
- 1 places of worship
- 1 banks
- 2 police & fire 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