The Alekseyev I-212 was a twin-engined, jet fighter designed in the USSR in 1947 by Experimental Design Bureau 21 (OKB). It was a two-seat variant of the I-21 (Istrebitel' - Fighter) that had been designed in response to a requirement for a very long-range fighter issued by the Soviet Air Forces in 1946. Intended as an escort fighter, it was also designed for use as a night fighter and reconnaissance aircraft. Sources are contradictory about the construction of a prototype, but it is known that the aircraft never flew.