ZIP code · Gerlaw · Illinois · United States
ZIP code 61435 — Gerlaw
ZIP code 61435 serves Gerlaw, Illinois.
- Postal code
- 61435Single source Value from one source, not cross-checked.
- City
- Gerlaw
- County
- Warren FIPS 17187
- State
- Illinois
- Country
- United States
- Coordinates
- 40.9863, -90.5491 — precision precise (locality)
View on OpenStreetMap - Population
- 181 (ZCTA, ACS 5-year)
- Population density
- 10 / sq mi
- Land area
- 17.4 sq mi (45.2 km²) (ZCTA, ACS 5-year)
- Per-capita income
- $41,512
- Median age
- 25.7
- Households
- 51
- Housing units
- 71
- 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
- 309 (from the nearest rate centre)Telephone 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 61435 with another ZIP · ZIPs within 25 miles · distance from 61435
Map of ZIP code 61435
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 15°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 36 | 50 | 63 | 73 | 81 | 84 | 83 | 77 | 65 | 49 | 37 |
| Avg low °F | 15 | 19 | 29 | 40 | 51 | 60 | 64 | 62 | 54 | 42 | 31 | 21 |
| Precip in | 1.9 | 2.0 | 2.6 | 4.0 | 5.2 | 4.5 | 4.0 | 3.9 | 3.7 | 3.0 | 2.6 | 2.1 |
NOAA 1991–2020 climate normals from the nearest station: MONMOUTH (5.5 mi) · NOAA NCEI
Places in ZIP 61435
- 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