Annangrove is a suburb of Sydney, in the state of New South Wales, Australia 42 kilometres north-west of the Sydney central business district in the local government area of The Hills Shire and part of the Hills District region.

[2] Annangrove is named after Annangrove House, the home of Edward Charles Johnston, a grandson of George Johnston who had received a large grant in present-day Annandale.

Edward Johnston bought his land in 1893 from Bennett William Johns.

The post office took the Annangrove name from his house when it opened on 16 October 1895,[3] as did the school in 1896.

The most common responses for religious affiliation were Catholic 40.8%, No Religion 19.7% and Anglican 14.8%.