Defunct companies based in Indianapolis

Duesenberg Automobile & Motors Company, Inc. was an American racing and luxury automobile manufacturer founded in Indianapolis, Indiana, by brothers Fred and August Duesenberg in 1920. The company is known for popularizing the straight-eight engine and four-wheel hydraulic brakes. A Duesenberg car was the first American car to win a Grand Prix race, winning the 1921 French Grand Prix. Duesenbergs won the Indianapolis 500 in 1922 (when eight of the top ten finishers were Duesenbergs), 1924, 1925 and 1927. Transportation executive Errett Lobban Cord acquired the Duesenberg corporation in 1926. T

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American low-cost scheduled and charter airline

regional airline and a subsidiary of Republic Airways Holdings based in Indianapolis, Indiana, USA

thumb|250px|AmericanConnection Embraer ERJ family|ERJ 140 operated by Chautauqua Airlines

defunct American motor vehicle manufacturer

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