Seagate or Sea Gate may refer to:

  • Seagate Technology, a manufacturer of computer hard disks
  • Sea Gate, Brooklyn, a community in Brooklyn, New York City, USA
    • East Coast Seagate Distribution, a (now defunct) comic book distributor named after the Brooklyn community
  • Seagate, North Carolina, a community in North Carolina, USA
  • One SeaGate, the tallest building in Toledo, Ohio
  • SeaGate Convention Centre in Toledo, Ohio
  • Seagate bus station, in Scotland
  • Seagate, a historic estate built in Florida in 1929 by Gwendolyn and Powel Crosley
  • Friends of Seagate, a 501(c)(3) nonprofit preservation organization formed in Florida
  • Sea gate, a channel or waterway which gives access to the ocean
  • A Sea-gate on a ferry