Seagate

Seagate or Sea Gate may refer to:
 * Sea gate, a channel or waterway which gives access to the ocean
 * Sea-gate, a castle drawbridge

In the United States

 * Sea Gate, Brooklyn, a gated community in New York
 * SeaGate Convention Centre in Toledo, Ohio
 * Seagate (Manatee County, Florida), a historic estate built in Florida in 1929
 * Seagate, North Carolina, a community in North Carolina
 * One SeaGate, a building in Toledo, Ohio

In Scotland

 * Seagate bus station, a station in Dundee
 * Seagate Castle, a castle North Ayrshire

Business

 * Seagate Technology, a data storage company
 * Sea Gate Distributors, a defunct comic book distributor
 * Seagate Software, a software company