Campsie is a suburb in the state of New South Wales, Australia. Campsie is 11 kilometres south west of the Sydney central business district, on the southern bank of the Cooks River. Campsie is one of the administrative centres of the City of Canterbury-Bankstown.

In the 2021 census, there were 26,132 people in Campsie. The most common reported ancestries were Chinese 34.5%, Nepalese 9.6%, English 7.1%, Australian 6.2% and Lebanese 5.5%. 28.6% of people were born in Australia. The next most common countries of birth were China 20.4%, Nepal 9.2%, Malaysia 4.3%, Vietnam 3.6%, and Philippines 2.9%. 20.0% of people only spoke English at home. Other languages spoken at home included Mandarin 21.5%, Nepali 9.2%, Cantonese 8.6%, Arabic 5.1% and Vietnamese 3.9%. The most common responses for religion were No Religion 31.7%, Catholic 16.2%, Buddhism 11.1%, and Hinduism 10.7%.

Campsie railway station is located on the Bankstown line of the Sydney Trains network. The line was opened in 1895 and electrified in 1926. Two additional tracks were laid for goods traffic. Campsie Station is located along the under construction Sydney Metro City & Southwest line and will be redesigned with improvements including Metro compatibility and platform screen doors.