Wellesley is a quiet locality in Western Australia within the Harvey local government area (postcode 6233). With a population of 35, the suburb has a mature demographic with a median age of 51. Households earn a median income of $59K per year, with an average household size of 2.7 people. The most common occupations are technicians & trades, labourers, sales. The top ancestries reported are Australian, English, Scottish.

The median weekly rent is $200 (Census 2021).