Area code 765 is a telephone area code in the North American Numbering Plan (NANP) for the central part of the U.S. state of Indiana. The numbering plan area comprises a horseshoe-shaped region of twenty counties surrounding the Indianapolis area, which is served by area codes 317 and 463. Some cities included are Anderson, Connersville, Crawfordsville, Frankfort, Greencastle, Kokomo, Lafayette, Marion, Muncie, New Castle, Richmond, and West Lafayette. The area code was created in 1997 in a split of area code 317 which was one of the two Indiana area code assigned to Indiana in 1947.
Prior to 1996, numbering plan area 317 consisted of all of Central Indiana. Eventually, population growth and increased demand for telecommunication services required an area code split to provide more central office prefixes for the region. Beginning on February 1, 1997, with mandatory dialing effective June 28, the greater Indianapolis area retained area code 317 and the remainder of Central Indiana received the new area code 765. The creation of 765 came amid some fanfare, as it was Indiana's first new area code in 49 years.