Sea Gate is a private, gated community at the far western end of Coney Island at the southwestern tip of the New York City borough of Brooklyn. It contains mostly single-family homes, some directly on Gravesend Bay. It is regularly patrolled by the Sea Gate Police Department which was established in 1899, though the New York City Police Department has joint jurisdiction over it.

The area that is now Sea Gate was once known as Norton's Point. The name came from the owner of a casino where the Coney Island Light now stands. The neighborhood held a reputation for gambling before it was developed into a neighborhood.

Sea Gate was developed into a full neighborhood in 1892 by developer Alrick Man.

Surrounded by water, Sea Gate is vulnerable to the whims of mother nature. In 1992, a nor'easter pounded the neighborhood, forcing it's evacuation. One house slid off it's foundation into the sea, and the storm caused considerable erosion and damage. In 1995 the Army Corps of Engineers completed it's work of repelenishing Coney beaches and building new jetties, including a long jetty at the border of Seagate and Coney Island. Unfortunately, this ended up causing more erosion on the Atlantic side of Seagate, and an accumulation of sand on the bay side. The second phase of this beach replenishment project has stirred some controversy. Although Sea Gate residents pay federal, state, and local taxes, in addition to Seagate homeowners fees, some people think tax dollars should not go to helping refurbish a private beach.

Residents refer to Sea Gate as "in the gate." There are no stores in the neighborhood.

Sea Gate's gated neighborhood is made up of 832 single-family homes, as of 2010. Homes in the neighborhood represent a variety of styles and architecture, including Queen Anne Style and Mediterranean.

In addition to long time residents, Sea Gate has seen an influx of immigrants from Eastern Europe and the former Soviet Union in recent years. Residents now represent Azerbaijan, Belarus, Poland, Romania and Ukraine, according to the 2000 U.S. census.

In addition to the large and private beach areas, Sea Gate has two parks:

The beaches in Sea Gate are uncrowded and patrolled during the summer by lifeguards. The Seagate beach is private and visitors must show beach passes. Beach access is also offered to members of the Seagate Beach Club. The beach club, originally for residents, is now privately run and open to anyone who pays for membership.

Located on Beach 47th Street in Sea Gate is the 75-foot-tall (23 m) Coney Island Light which is a lighthouse built in 1890, before the area was populated. The lighthouse is the former home of Frank Schubert, the United States' last civilian lighthouse keeper. Schubert died in 2003.

The chapel, once used for services and built in 1901, is a historical building now used for social events, yoga classes, and is a polling site at election times. The Chapel with its stained-glass windows is the first structure seen when entering the main (police protected) gate.

Beach strip

Eastern border of Sea Gate

The Atlantic Yacht Club building, which burned down in 1934

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