Rostislav Evgenievich Alexeyev (Russian: ????????´? ????´?????? ??????´??; December 18, 1916 – February 9, 1980) was a Russian Soviet shipbuilder known for his pioneering work on hydrofoil ships and ground effect vehicles.
Alexeyev was an accomplished designer of hydrofoil ships, such as the Raketa, and became a prominent developer of ground effect vehicles, particularly the Caspian Sea Monster and the A-90 Orlyonok.