Viv Farnsworth (4 February 1889 – 16 April 1953) was an Australian professional rugby league footballer who played in the 1910s and 1920s.

After touring New Zealand with New South Wales in 1912, Farnsworth headed back to England and joined the Oldham club.

After the war, Farnsworth re-joined Sydney club Newtown in 1919 but by 1920 he had moved to Wests where he played for two seasons.

Farnsworth participated in the Ashes-winning series of 1920, again proving a formidable combination with Herb Gilbert in the second Test at the Sydney Cricket Ground.

Although the score was even at 8–all at half-time, tries to Australia's three-quarter line of Dick Vest, Farnsworth, Gilbert and Harold Horder secured the Ashes.