Mercer County ZIP Codes

List of ZIP Codes in Mercer County

The following table lists ZIP Codes associated with Mercer County, Illinois, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.

S.N.	Zip Code	Latitude	Longitude	City	Population	Density
1	61231	41.2128	-90.72294	Aledo	4,958	12.5
2	61260	41.24141	-90.88407	Joy	635	4.2
3	61263	41.26409	-90.59878	Matherville	718	202.8
4	61272	41.24817	-91.00865	New Boston	1,463	6.3
5	61276	41.31667	-90.57638	Preemption	28	31.9
6	61279	41.32574	-90.72863	Reynolds	960	9.4
7	61281	41.3009	-90.51992	Sherrard	2,610	25.1
8	61412	41.07092	-90.58853	Alexis	1,310	6.3
9	61442	41.10237	-90.92303	Keithsburg	550	7.4
10	61465	41.20618	-90.46744	New Windsor	1,251	11.9
11	61466	41.11103	-90.48222	North Henderson	274	4.4
12	61476	41.09191	-90.83259	Seaton	553	4.8
13	61486	41.19609	-90.57614	Viola	1,429	12.7

About Mercer County ZIP Codes

Mercer County in Illinois (IL) is served by approximately 13 ZIP Codes. These codes cover residential neighborhoods, business districts, and rural areas that fall under the county's jurisdiction.

Based on ZIP-level population estimates, the total population covered by these ZIP Codes is around 16,739 people. Population and density values vary from one ZIP Code to another, reflecting the mix of dense urban communities and lower-density suburban or rural zones.

Many of the most significant population centers in Mercer County are located in cities such as Aledo, Sherrard, New Boston, Viola, Alexis. These cities and towns help define the economic and demographic character of the county.

Most ZIP Codes in Mercer County, Illinois follow the America/Chicago time zone.

Mercer County ZIP Codes

List of ZIP Codes in Mercer County

About Mercer County ZIP Codes

Illinois Counties ZIP Codes

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