The South Western Advertiser (also known as the South-Western Advertiser) was a newspaper published weekly in Pinjarra, Western Australia from 1910 to 1954.^[1]

At the time of its first publication, the South Western Advertiser was circulated in the south-western area between Armadale and Brunswick, and was the only newspaper published between Perth and Bunbury.^[2][3]

Richard Sampson launched the South Western Advertiser,^[3] and many other local publications in the early 20th century. There was some concern about one individual owning a significant portion of the country's rural media, but The Swan Express remarked "Mr Sampson is at least entitled to the credit that he has given to several neglected districts a channel for the expression of their grievances."^[4]

The newspaper sponsored a shooting competition in 1935 and 1936, offering a trophy to the winner. The 1935 competition was held on 17 March 1935 with a C Dawe winning.^[5][6][7] P L Pavy won the next competition, held on 31 May 1936.^[8]