Glendon Brook is a locality in the Singleton Council region of New South Wales, Australia.

[1] Glendon Brook Public School opened in November 1878 and closed in December 1950.

[3] Glendonbrook Post Office opened in 1874 and closed on 31 August 1976.

St Paul's Catholic Church at Glendon Brook celebrated its 125th anniversary in 2014.

[6] Glendon Brook has a number of heritage-listed sites, including: