what area code is 309

The 309 area code is located in the west-central part of the U.S. state of Illinois. It includes cities such as Bloomington, Canton, East Moline, East Peoria, Galesburg, Kewanee, Macomb, Minonk, Moline, Morton, Normal, Pekin, Peoria, Rock Island, Silvis, and many smaller communities in west-central Illinois. The area code was created in 1957 in a split of area code 815. On February 24, 2023, area code 861 was added to the numbering plan area on February 24, 2023, in formation of an overlay. This means that the same geographic area will have two area codes, and callers will need to dial the area code plus the seven-digit phone number for all calls.