Seatrain may refer to:
Seatrain Lines, a defunct U.S. shipping company Seatrain shipbuilding, a shipbuilding subsidiary of Seatrain Lines Seatrain (band), a late 1960s – early 1970s roots-fusion band Sea Train (album), a 1969 album by the band Seatrain Seatrain (album), a 1970 album by the band Seatrain Sea Train, a type of conveyance in the One Piece manga Sea Train, a formerly unidentified sound
See also C-Train, a light rail transit system in Calgary, Canada