Gahanna is a city in northeastern Franklin County, Ohio, United States.

[5] Gahanna was founded along the Big Walnut Creek in 1849 by John Clark of Ross County from 800 acres (320 ha) of land that his father, Joseph Clark, had purchased from Governor Worthington in 1814.

[8] The City of Gahanna's Official Seal refers to this confluence of three creeks with the inscription "Three In One".

[9] Located directly across Granville Street from Gahanna and also along the banks of the Big Walnut Creek, Bridgeport was founded in 1853 by Jesse Baughman, a former Franklin County Commissioner.

In March 1881, 55 citizens of Gahanna petitioned Franklin County to incorporate the village.

[12] On January 7, 1994, United Express Flight 6291 crashed in Gahanna, killing five of the eight people on board.

[13][14] On February 11, 2016, a mass stabbing took place at the Nazareth restaurant, located just outside Gahanna in neighboring Columbus.

The multimillion-dollar project is expected to bring in up to 150 new residents as well as bolster tourism to the area.

[21] Gahanna also has an aggressive brownfields assessment and redevelopment program that includes the development of a community-wide brownfields inventory, the cleanup of a major abandoned landfill, and city-initiated assessments and demolition of abandoned or environmentally suspect properties.

The closure was a result of a 2005 public-private development partnership with private firm Value Recovery Group, of Columbus, Ohio, and non-profit Central Ohio Community Improvement Corporation to remediate and redevelop the abandoned Bedford I Landfill.

Funding for this major project included $3,000,000 from the Clean Ohio Redevelopment Fund, $200,000 from the US EPA,[22] $150,000 from the Community Development Block Grant program, significant assistance with assessment, stormwater remediation, and staff time from Gahanna, and other investments by the Central Ohio CIC.

In addition, both roads are accessible through the Columbus Outerbelt (Interstate 270), which runs between the city and John Glenn Airport.

Ohio State Route 317 also runs through downtown Gahanna as the main north-south road.

Public transport to and from Gahanna is accessed through COTA, which runs bus lines 24 and 25 through downtown.