William Ambrose Tarrant (22 September 1866 – 1 November 1938) was an Australian cricketer who played at first-class level for Victoria during the 1890s.

A right-handed batsman born in Fitzroy, Tarrant made his debut for Victoria in January 1890, playing a standalone fixture against Tasmania at the TCA Ground in Hobart.

In total, Tarrant played nine first-class matches, scoring 233 runs at an average of 17.92.

[1] His highest first-class score (and only half-century) had come in Sydney in January 1892, an innings of 82 runs against New South Wales that helped Victoria win by an innings and 15 runs.

His final career tally of 142 matches includes a one-off appearance for Fitzroy against University during the 1921–22 season, at the age of 55.