Tanglewood, also known as Tanglewood-Hillsdale, is a suburban neighbourhood in Knoxdale-Merivale Ward in the city of Ottawa. It is located within the former City of Nepean in the west end of the city. It is located in the federal and provincial ridings of Nepean-Carleton. It is informally bounded by CN Railway to the north, Merivale Road to the east, Hunt Club Road to the south, and Woodroffe Avenue to the west.
The Tanglewood sector was built between 1968 to 1986 and the Hillsdale sector was built in the early to mid 1980s. In 2006, Tanglewood-Hillsdale had 1,871 dwellings; 22% of these being single homes, 21% being semi-detached, 45% being townhouses and 12% being a apartments. Seventy 70% owned, while 30% of residents rented their homes.