ZIP Codes Box

Knox County, Illinois ZIP codes

17ZIP codes
16Cities and towns
49,261People in ZIP areas
309Area code

Knox County is in Illinois and the Central Time zone. ZIP codes don’t follow county lines exactly, so a ZIP code listed here can reach into a neighboring county.

All ZIP codes in Knox County

ZIP codeCityTypePopulationMedian income
61401GalesburgStandard30,580$50,546
61402GalesburgPO Box only1,623–
61410AbingdonStandard3,838$62,925
61414AltonaStandard696$48,929
61428DahindaStandard1,278$77,143
61430East GalesburgStandard713$79,333
61436GilsonStandard745$76,000
61439HendersonPO Box only299$59,125
61448KnoxvilleStandard3,947$82,500
61458MaquonStandard656$65,461
61467OneidaStandard1,159$88,472
61472RioStandard453$76,500
61474Saint AugustineStandard221$59,583
61485VictoriaStandard417$59,306
61488WatagaStandard1,084$68,333
61489WilliamsfieldStandard820$98,125
61572Yates CityStandard732$73,125

Cities and towns in Knox County

Area codes in Knox County

Questions

How many ZIP codes are in Knox County, IL?
Knox County has 17 ZIP codes, 15 of them standard ZIP codes for street addresses.
What cities are in Knox County?
Knox County ZIP codes cover Galesburg, Abingdon, Altona, Dahinda, East Galesburg, Gilson, Henderson and Knoxville and 8 other places.
What area code is Knox County, IL?
Knox County uses area code 309.
What time zone is Knox County in?
Knox County is in Central Time.

Other Illinois counties