Richland County ZIP Codes

List of ZIP Codes in Richland County

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

About Richland County ZIP Codes

Richland County in Illinois (IL) is served by approximately 6 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 15,706 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 Richland County are located in cities such as Olney, Noble, Dundas, Claremont, Calhoun. These cities and towns help define the economic and demographic character of the county.

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