Glenwood takes its name from an historic property in the area, named 'Glenwood Park' in the 1940s, but previously known as Norfolk Vale (1846-1882), and Sorrento (1882-1941). It was formally recognised as a suburb in 1996.
It is noted as the first site to be developed within the Rouse Hill Development area.
At the 2011 census, there were 15,325 residents in Glenwood. The population was younger than average, with a median age of 32, and 26.6% of people aged 14 years and under. Just over half of people were born in Australia, with the top other countries of birth being India 9.5%, Philippines 5.1% and Sri Lanka 2.5%.
The Westlink M7 Motorway runs along the southern border of the suburb and provides a link to the M2 Hills Motorway. Old Windsor Road borders the suburb to the east & Sunnyholt Rd borders the suburb to the west & north.
Hillsbus provides services to Rouse Hill (602, 607X, 617X, T63, T64, T65, T66 - note that the 617X does not stop at the Rouse Hill Town Centre, rather, it terminates at Adelphi St, 607X services proceed to Rouse Hill Town Centre), Parramatta (T63, T64, T65, T66), North Sydney (602) and Sydney CBD (607X, 616X, 617X) whilst Busways provides regular services to Norwest Business Park (T70),Blacktown (T70), Castle Hill (T70, 745) and Macquarie Park (740).
The suburb is serviced by Burns and Sorrento stations on the Blacktown-Parklea branch of the North-West T-way, and Burns, Balmoral, Celebration, Meurants and Norbrik stations on the Rouse Hill-Parramatta section of the T-way.
Glenwood will be served by Bella Vista station on the future North West Rail Link, to be operational by the end of 2019, providing high frequency services towards Macquarie Park and Chatswood.