Geographic Regions and Area Codes in Indianapolis

Indianapolis, the largest city in Indiana, serves as the capital and is at the heart of a nine-county metropolitan area. This area includes Marion County and extends to surrounding counties such as Hamilton, Hendricks, Johnson, Morgan, Hancock, Boone, Brown, and Shelby. The city covers an area of approximately 373 square miles (966 square kilometers). The primary area codes serving Indianapolis are 317 and 463. Additionally, the surrounding regions may use area codes 765, 812, and 930.

Key regions and their area codes:

  • Marion County: 317, 463
  • Hamilton County: 317, 463
  • Hendricks County: 317, 463
  • Johnson County: 317, 463
  • Morgan County: 317, 463
  • Hancock County: 317, 463
  • Boone County: 317, 463
  • Brown County: 317, 463
  • Shelby County: 317, 463