The Richmond, Indiana, explosion was a double explosion in the United States in 1968. It occurred at 1:47 PM EST on April 6, in downtown Richmond, Indiana. The explosions killed 41 people and injured more than 150. The primary explosion was due to natural gas leaking from one or more faulty transmission lines under the Marting Arms sporting goods store, located on the southeast corner of the intersection of 6th and Main (US 40) streets. A secondary explosion was caused by gunpowder stored inside the building.

Richmond is a city in east central Indiana, United States of America, bordering the state of Ohio. It is the county seat of Wayne County, and is part of the Dayton, Ohio metropolitan area. In the 2010 census, the city had a population of 36,812.

Situated largely within Wayne Township, its area includes a non-contiguous portion in nearby Boston Township, where Richmond Municipal Airport is currently located.

Richmond is sometimes called the "cradle of recorded jazz" because the earliest jazz recordings and records were made at the studio of Gennett Records, a division of the Starr Piano Company. Gennett Records was the first to record such artists as Louis Armstrong, Bix Beiderbecke, Jelly Roll Morton, Hoagy Carmichael, Lawrence Welk, and Gene Autry.The city has twice received the All-America City Award, most recently in 2009.