ZIP code · Galesburg · Illinois · United States
ZIP code 61402 — Galesburg
ZIP code 61402 serves Galesburg, Illinois.
- Postal code
- 61402Single source Value from one source, not cross-checked.
- City
- Galesburg
- County
- Knox FIPS 17095
- State
- Illinois
- Country
- United States
- Coordinates
- 40.9478, -90.3712 — precision precise (locality)
View on OpenStreetMap - Population
- 1,634 (ZCTA, ACS 5-year)
- Population density
- 19,237 / sq mi
- Land area
- 0.1 sq mi (0.2 km²) (ZCTA, ACS 5-year)
- Per-capita income
- $313
- Median age
- 41.5
- Households
- 0
- Housing units
- 0
- 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 61402 with another ZIP · ZIPs within 25 miles · distance from 61402
Map of ZIP code 61402
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 | 30 | 35 | 48 | 61 | 72 | 81 | 84 | 82 | 76 | 63 | 48 | 35 |
| Avg low °F | 14 | 17 | 28 | 40 | 52 | 62 | 65 | 63 | 55 | 43 | 30 | 20 |
| Precip in | 1.7 | 1.9 | 2.4 | 3.8 | 5.3 | 4.6 | 4.0 | 3.9 | 3.9 | 2.8 | 2.6 | 2.1 |
NOAA 1991–2020 climate normals from the nearest station: GALESBURG (0.7 mi) · NOAA NCEI
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