|• Councilmember||Mary Cheh|
In 1790, locals began calling the neighborhood "Tennally's Town" after area tavern owner John Tennally. Over time, the spelling has evolved and by the 19th century the area was commonly known by its current name, although the spelling Tennallytown continued to be used for some time in certain capacities, including streetcars through the 1920s.
The area is the site of Fort Reno, one of the forts that formed a ring around Washington, D.C. during the American Civil War to protect the capital against invasions. It proved to be the crucial lookout point for preventing a siege of Washington, because it is the highest natural elevation point in the District of Columbia.
Fort Reno was decommissioned with the surrender of the Confederate army. The last remains of Fort Reno were removed about 1900, when the land owned by the Dyer family was being prepared for a reservoir.
Due to its elevation it is also the site of the oldest home in Washington, D.C. Charles Jones's home called "The Rest" was believed to be originally built around 1700 and majorly expanded around 1800. This home stayed in the Jones family until 1920 when the Magruder's (local grocers) bought the home. In 1974, the current family owning the home bought the house and still own it today.
After the American Civil War, what is now Fort Reno Park developed into an African-American community. This community existed in tension with the white residents of Tenleytown, as well as major landholders. Eventually, a coalition of groups persuaded the unelected government of DC and the Federal Government to clear the community for segregated neighborhood resources: Deal Middle School, a park, and a water tower. The Reno School building, built in 1903 for African-American students, is one of the few remaining traces of this community.
Within the park boundaries lies the highest natural point in the District of Columbia, 409 feet above sea level. Fort Reno also hosts community gardens, free rock concerts in the summer, sledding in the winter, and tennis courts, playing fields, and dog-walkers year round. Jackson-Reed HS baseball now uses the ball field for its home games.
Tenleytown was transformed on October 2, 1941 when Sears Roebuck opened its department store on Wisconsin Avenue at Albemarle Street. At the time the store was notable for its size and for its 300 car rooftop parking lot. In the 1990s, Sears abandoned its retail operation at the location and the building was used by Hechinger hardware until its demise in the late 1990s. In the 2000s, the building was converted to a mixed-use development complex called Cityline at Tenley, with luxury condominiums (The Cityline) on the top levels, a Best Buy (later closed) and The Container Store at street level, and an Ace Hardware underground, located within the parking garage that serves the aforementioned stores. The west entrance to the Metro station is at the front of the building across from Whole Foods Market.
In 2010, the Top of the Town: Tenleytown Heritage Trail opened. The path starts from the Tenleytown-AU metro station and passes by neighborhood landmarks such as American University, Fort Reno Park, and the studios of WRC-TV, Washington's NBC affiliated station.
The neighborhood is home to the highest point in Washington, Fort Reno Park, which houses a baseball field and a soccer field. Due to the high altitude, the neighborhood is home to nearly all of the city's radio masts and towers including the studios and/or towers for WRC-TV, WTTG, WUSA, WETA-TV, WHUT-TV, WDCA, WPXW-TV, WJLA-TV, and radio stations WAMU and WTOP-FM. American Tower started to build an even higher tower, 756 feet (about 230 meters) tall, which could support 169 transmitters, but the District of Columbia government reversed its position, and the incomplete tower was demolished in August 2006.
Tenleytown and adjacent American University Park are served by the Tenleytown-AU stop on the Washington Metro Red Line. A free shuttle bus runs between the Metro stop and American University's main campus. The station is located in the heart of the neighborhood at the intersection of Wisconsin Avenue and Albemarle Street. Metrobus routes 31, 32, 36, 33, 30S, 30N, 37, D32, H2, H3, H4, M4, W45, and W47 serve the neighborhood, all making stops at the station.
The neighborhood is defined by Tenley Circle which lies at the intersection of Nebraska Avenue, Wisconsin Avenue, and Yuma Street. On Tenley Circle itself is St. Ann's Catholic Church, a large imposing stone church which serves area Catholics. On the opposite side of the circle is Wisconsin Avenue Baptist Church. American University's Washington College of Law, on the site of the former Immaculata School, also bounds the western edge of the circle.
The area is served by the District of Columbia Public Schools. Tenleytown is zoned to:
Tenleytown is the location of several independent schools, including National Presbyterian School (PS-6) and the new unified campus of Georgetown Day School (prior to the construction, only the high school campus was located in Tenleytown).
The District of Columbia Public Library system operates the Tenley-Friendship Neighborhood Library. After seven years in an interim location, the library reopened in 2011 at the corner of Wisconsin Avenue and Albemarle Streets.
There are several historic landmarks in Tenleytown that are listed on the National Register of Historic Places (NRHP). Residential listings include the N. Webster Chappell House, Dumblane, and Grant Road Historic District. Commercial properties listed on the NRHP include the Sears, Roebuck and Company Department Store and Chesapeake and Potomac Telephone Company, Cleveland-Emerson Exchange. Religious listings include Convent de Bon Secours, the Immaculata Seminary Historic District, Eldbrooke United Methodist Church and its adjoining Methodist Cemetery. There are two educational properties listed on the NRHP, Jackson-Reed High School and Janney Elementary School.
- "Tenleytown, Tennallytown, or Tenallytown?". Ghosts of DC. Retrieved 29 August 2015.
- Helm, Judith Beck (2000). Tenleytown, D.C. : Country Village into City Neighborhood. Washington, DC: Tennally Press. p. 64. ISBN 0-9606986-1-2.
- "the Tenleytown Historical Society". www.tenleytownhistoricalsociety.org. Retrieved 2016-03-23.
- Forgey, Benjamin (September 3, 2005). "Top Floor: Home Goods". The Washington Post.
- "Digital Signal Sources". The Washington Post.
- Schwartzman, Paul (March 18, 2006). "Steel 'Monstrosity' In Tenleytown To Be Dismantled". The Washington Post.
- "Timetables". Washington Metropolitan Area Transit Authority.
- "Elementary Schools" (2016-2017 School Year). District of Columbia Public Schools. Retrieved on May 27, 2018.
- "Middle School Boundary Map" (2016-2017 School Year). District of Columbia Public Schools. Retrieved on May 27, 2018.
- "High School Boundary Map" (2016-2017 School Year). District of Columbia Public Schools. Retrieved on May 27, 2018.
- "Hours & Locations." District of Columbia Public Library. Retrieved on October 21, 2009.
- Cultural Tourism entry for African-American landmarks
- When Did Tennallytown Become Tenleytown? - History blog post by local blog Ghosts of DC
- Tenleytown, Tennallytown, or Tenallytown? - History blog post by local blog Ghosts of DC
-  (Historic Preservation Review Board's staff report on proposed multi-property historic designation for Tenleytown)