Find the last 4 digits (ZIP+4) for an address in 61436

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ZIP Code 61436 – Gilson, IL

Gilson, Illinois · Knox County · Central time

ZIP code61436
CityGilson
StateIllinois
CountyKnox County
Population745
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area61.18 sq mi
Center (lat, long)40.8601, -90.2232

Area codes in this area

861

These are the area codes that most often serve ZIP 61436 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

61448 Knoxville · 5.2 mi61458 Maquon · 5.8 mi61430 East Galesburg · 7.4 mi61428 Dahinda · 7.6 mi61401 Galesburg · 10.4 mi61572 Yates City · 10.5 mi61544 London Mills · 11 mi61402 Galesburg · 11 mi

About ZIP 61436

ZIP code 61436 is assigned to Gilson, Illinois. It lies in Knox County. Its Census area covers about 61.18 square miles of land. The closest neighboring ZIP is 61448 (Knoxville), about 5.2 miles away.

Every address in 61436 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources