OKB 115 Yakovlev Design Bureau, named after its founder Alexander Sergeevich Yakovlev, was a Soviet aircraft engineering bureau, and is now a joint-stock company of the United Aircraft Corporation.

The name Yakovlev is widely used in the West, but in Russia it is shortened to Yak followed by the name, or model, of the aircraft.

During World War II, Yakovlev designed and produced a famous line of fighter aircraft: the company is known for its highly successful line of piston-engined fighter aircraft from World War II:

• Yak-1

• Yak-3

• Yak-5

• Yak-7

• Yak-9

• Yak-15