Senyavin (Russian: Сенявин) (sometimes misspelled as Sinyavin) is a Russian noble family (dvoryans), famous for its Imperial Russian Navy officers.
- Aleksey Senyavin (1716-1797), a Russian admiral
- Dmitry Senyavin, a Russian admiral who ranks among the greatest seamen of the Napoleonic Wars
- Ivan Akimovich Senyavin (?-1726), a Russian rear admiral, head of the port of Astrakhan
- Ivan Grigoryevich Senyavin (1801-1851), a Russian statesman and senator
- Lev Senyavin (1805-1861), a Russian statesman and senator
- Naum Senyavin, a Russian vice admiral of the Imperial Russian Navy
- Nikolai Senyavin, a Russian vice admiral of the Imperial Russian Navy
Named after them:
- Admiral Senyavin (battleship) (Russian battleship Admiral Senyavin)
- Admiral Senyavin class of battleships
- Senyavin Islands, a group of islands which belong to the Federated States of Micronesia
- Senyavin Strait, a strait in the Bering Sea