2 February 1892 Members of the St George's Reading Society in Perth resolved to form an SPCA.

2 August 1892 Society formally constituted under the name The West Australian Society for the Prevention of Cruelty to Animals.

11 August 1914 Society registered under the Associations Incorporation Act 1895 - name changed to The WA Society for the Prevention of Cruelty to Animals (Incorporated).

25 September 1920 Becomes The WA Royal Society for the Prevention of Cruelty to Animals (Incorporated) after King George V offered Royal Patronage - the first Society outside of the UK to enjoy Royal Patronage.

21 June 1950 Becomes The Royal Society for the Prevention of Cruelty to Animals Western Australia (Incorporated)

May 1998 First Million Paws Walk - event has now become the RSPCA's biggest annual fundraising event.

Funds raised contributed to the construction of a dedicated animal shelter in Malaga, which has provided the RSPCA with the ability to find new homes for thousands of neglected, abused and abandoned animals.

17 October 1999 Malaga Animal Welfare Centre Ground Breaking Ceremony by the Governor Major-General Michael Jeffrey.

25 June 2000 Official opening by Premier Richard Court of Stage Two of the Centre including dog exercise yards.

2001 State Government honours promise to introduce new animal welfare legislation and to provide a recurring grant of $250,000 per year to the Society (raised to $500,000 in 2011).

24 July 2018 RSPCA WA is registered as a public company limited by guarantee under the Corporations Act 2001 (Cth)