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  5. Area Code 309

Where Is Area Code 309?

Area code 309 is found in the US state of Illinois. Primarily servicing the city of Peoria (population: 136591), area code 309 covers 20 counties of Illinois.

Located in the Central time zone, area code 309 is on the same time as Chicago, IL.

Area code 309 was brought into effect on January 1, 1957.

Map of  with area code 309 highlighted

Counties in Area Code 309

  • Dewitt,
  • Fulton,
  • Hancock,
  • Henderson,
  • Henry,
  • Knox,
  • Marshall,
  • Mason,
  • McDonough,
  • McLean,
  • Mercer,
  • Peoria,
  • Rock Island,
  • Stark,
  • Tazewell,
  • Warren,
  • Whiteside,
  • Woodford.

Most Populous Cities in Area Code 309

City County City Population Time Zone
Peoria Peoria 136,591 CST
Bloomington McLean 85,694 CST
Normal McLean 53,723 CST
Moline Rock Island 45,071 CST
Pekin Tazewell 43,989 CST
Rock Island Rock Island 39,092 CST
Galesburg Knox 34,349 CST
East Peoria Tazewell 25,386 CST
East Moline Rock Island 24,038 CST
Washington Tazewell 23,841 CST
Macomb McDonough 22,035 CST
Morton Tazewell 17,793 CST
Canton Fulton 17,637 CST
Kewanee Henry 14,120 CST
Metamora Woodford 12,180 CST
Monmouth Warren 11,656 CST
Geneseo Henry 11,339 CST
Chillicothe Peoria 11,248 CST
Milan Rock Island 10,540 CST
Dunlap Peoria 9,057 CST
Silvis Rock Island 7,804 CST
Colona Henry 7,077 CST
Eureka Woodford 6,766 CST
Peoria Heights Peoria 6,140 CST
Coal Valley Rock Island 5,860 CST

Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.

View all United States Area Codes.

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This page was last modified on July 3, 2015.