ZIP Codes Box

Mercer County, Illinois ZIP codes

11ZIP codes
11Cities and towns
14,241People in ZIP areas
309, 319Area codes

Mercer 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 Mercer County

ZIP codeCityTypePopulationMedian income
61231AledoStandard4,962$70,991
61260JoyStandard737$41,645
61263MathervillePO Box only657$86,500
61272New BostonStandard1,437$64,167
61276PreemptionPO Box only88$87,750
61281SherrardStandard2,520$102,639
61442KeithsburgStandard504$48,750
61465New WindsorStandard1,192$56,875
61466North HendersonStandard263$73,462
61476SeatonStandard551$88,264
61486ViolaStandard1,330$78,889

Cities and towns in Mercer County

Area codes in Mercer County

Questions

How many ZIP codes are in Mercer County, IL?
Mercer County has 11 ZIP codes, 9 of them standard ZIP codes for street addresses.
What cities are in Mercer County?
Mercer County ZIP codes cover Aledo, Joy, Keithsburg, Matherville, New Boston, New Windsor, North Henderson and Preemption and 3 other places.
What area code is Mercer County, IL?
Mercer County uses area codes 309 and 319.
What time zone is Mercer County in?
Mercer County is in Central Time.

Other Illinois counties