Area Code 309 Location

Area code 309 serves Bloomington, Illinois, and much of west-central Illinois, placing it in the heart of the state’s prairie region. Centered around the “Twin Cities” of Bloomington–Normal, this area code links major highways like I-55 and I-74, making it a key hub for travel, business, and education. Bloomington is home to State Farm and neighbors Illinois State University in Normal, adding strong economic and campus life to the region. The 309 area code sits within the Central Time Zone and covers communities along the Illinois River and the Mississippi River.

Cities and landmarks commonly associated with the 309 area code include:

• Bloomington–Normal (State Farm, Illinois State University)
• Peoria (Peoria Riverfront Museum, a long-time manufacturing center)
• The Illinois Quad Cities: Moline, Rock Island, and East Moline (Deere & Company World Headquarters in Moline)
• Galesburg (Knox College)
• Macomb (Western Illinois University)
• Pekin, East Peoria, Canton, and Galesburg-area communities

“Area code 309 was established in 1957.” — North American Numbering Plan Administrator (NANPA)

For phone numbers in 309, expect coverage across a wide swath of central and west-central Illinois that does not include Chicago or Springfield. The code connects historic river cities, college towns, and manufacturing centers, giving callers a clear signal they’re reaching the heart of Illinois. From the Quad Cities on the Mississippi to Peoria on the Illinois River and the Bloomington–Normal metro, 309 ties together major employers, universities, and cultural venues. Its mix of industry, education, and transportation makes 309 a widely recognized Illinois area code.