Officer is a suburb of Melbourne, Victoria, Australia, 48 km south-east of Melbourne’s Central Business District and the second most populous in the Shire of Cardinia after Pakenham. Officer recorded a population of 18,503 at the 2021 census.

In Officer 70.1% of people were born in Australia. The most common ancestries in Officer were English 25.7%, Australian 24.6%, Irish 6.7%, Scottish 5.9% and Indian 4.0%. The most common countries of birth outside of Australia were England 4.3%, India 4.3%, Sri Lanka 2.9%, New Zealand 1.8% and Philippines 1.0%. 0.6% of people in Pakenham are Aboriginal. The most common responses for religion in Officer (State Suburbs) were No Religion, so described 32.9%, Catholic 24.5%, Anglican 9.4%, Not stated 6.3% and Christian, nfd 4.5%. In Officer (State Suburbs), Christianity was the largest religious group reported overall 53.2%.