Forest Glen is a census-designated place (CDP) in Montgomery County, Maryland, United States.

Forest Glen is also home to the National Park Seminary, a unique and landmark residential community in an old building complex.

Forest Glen was once part of a land grant made in 1680 to one of Archbishop John Carroll's ancestors.

[6] Carroll's body was buried in St. John the Evangelist Catholic Church Cemetery in Forest Glen.

[6] Racial covenants were used in the Woodside Knolls neighborhood of Forest Glen to exclude Black and Jewish residents.

A 1939 covenant from Woodside Knolls states: "No part of the land above described shall ever be used or occupied by or sold demised, transferred unto, or in trust for, leased, or rented, or given to negroes, or any person or persons of negro blood extraction, or to any person of the Semitic race, blood or origin, which racial description shall be deemed to include Jews and Hebrews, except that this paragraph shall not be held to exclude partial occupancy of the premises by domestic servants of said races.

[8] Forest Glen station was originally planned to be built above-ground, which would have required the demolition of about fifteen homes.

[9] The community also opposed the originally planned location for the station, on the east side of Georgia Avenue between Sherwood Road and Tilton Drive.

[13] In 2018, WMATA announced that it would do a feasibility study on the redevelopment of the 8-acre (32,000 m2) parking lot of Forest Glen station.