Potomac city is located in Illinois State, Vermilion County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Potomac IL zip code by its streets and block numbers if we have some of the Potomac streets loaded in our website
Potomac Area Code is 217 and Time Zone is Central (GMT -06:00).
Potomac Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Potomac City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Potomac ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Potomac, Illinois.
If you want to send a mail to Potomac City, you should use the 61865 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Potomac ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 61865 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Potomac city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Illinois.