Anthony James Joseph St Ledger (18 February 1859 – 17 April 1929) was an English-born Australian politician.
Born in Barnsley, England, he migrated to Australia as a child and was educated at St Killan College in Ipswich, Queensland.
He became a teacher with the Queensland Education Department, but studied law, eventually becoming a barrister.
In 1906, he was elected to the Australian Senate as an Anti-Socialist Senator for Queensland, joining the Commonwealth Liberal Party when the Anti-Socialists were absorbed in 1909.
He remained in the Senate until his defeat in 1913.
Leaving politics, he moved to Melbourne to continue his career in law.