Sejna or Šejna may refer to:
Jan Šejna (1927–1997), Czech-Czechoslovak general who defected to the US in 1968 Karel Šejna (1896–1982), Czech conductor Marco Sejna (born 1972), German footballer Peter Sejna (born 1979), Slovak ice hockey player 21985 Šejna, a main belt asteroid Sejny, a town in Poland
See also Miloš Šejn Shein (disambiguation) Schein Şeineanu Sajnovics