Ottawa IL ZIP Code
Ottawa city is located in Illinois State, La Salle County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Ottawa IL zip code by its streets and block numbers if we have some of the Ottawa streets loaded in our website
Ottawa Area Code is 815 and Time Zone is Central (GMT -06:00).
Ottawa Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Ottawa City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Ottawa ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Ottawa, Illinois.
The Ottawa Zip Code is 61350.
If you want to send a mail to Ottawa City, you should use the 61350 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Ottawa 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 61350 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Ottawa 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.