Seat Pleasant is an incorporated city in Prince George's County, Maryland, United States, located immediately east of Washington D.C..[3] Per the 2020 census, the population was 4,522.

In 1850, the descendants of General Otho Holland Williams, a Revolutionary War hero, and James Berry, a mid-17th-century Puritan leader, sold it to Joseph Gregory.

In 1873, some of the land along Addison Road was subdivided into small farms and rural home sites known as Jackson's Subdivision.

The Columbia Railway Company operated a streetcar system that extended through Northeast Washington and terminated in Seat Pleasant at Eastern Avenue, near what is today Martin Luther King Jr. Highway.

Finally, the Washington, Baltimore and Annapolis Electric Railway passed through Seat Pleasant in 1908.

[7] In 1906, the growing number of residents in the area around the station adopted a more imaginative name for their community — Seat Pleasant, after the early Williams-Berry estate.

[7][9] When the community was incorporated as a town in 1931, it had a school, water company, sewer connections courtesy of the District of Columbia's sanitary system, and reliable fire protection by the Seat Pleasant Fire and Community Welfare Association.

In the 1980s, the old railroad roundhouse and turntable were demolished to make room for the Addison Plaza Shopping Center on Central Avenue.

Construction of "affordable" housing, notably the Gregory Estates apartments in 1949, was the catalyst for the migration of African-American families from the District of Columbia; before that time, the community had been all white.

[5] The right of way of the former Washington, Baltimore and Annapolis Electric Railway was utilized in the early 1940s for the George Palmer Highway, later renamed the Martin Luther King Jr.

[20] According to the United States Census Bureau, the city has a total area of 0.73 square miles (1.89 km2), all land.

MD 704 connects southwest into Washington, D.C., and northeastward to U.S. Route 50 (John Hanson Highway).

The Seat Pleasant Police Department (SPPD) is the primary law enforcement agency servicing the municipality.

The SPPD is assisted by the Prince George's County Police Department and the Sheriff's Office as directed by authority.

[28] Prince George's County Police Department District 8 Station in Upper Marlboro CDP serves the community.

The total response area was about 38 square miles (98 km2) serving over 250,000 citizens averaging about 7000 calls a year.