Hannibal Hawkins Macarthur (16 January 1788 – 21 October 1861) was an Australian colonist, politician, businessman and wool pioneer.

When his uncle John returned to New South Wales after resigning his commission to avoid being posted to Norfolk Island, he persuaded Hannibal to join him.

[1][2] He left New South Wales in 1808 for England by way of China and the Philippines, where he unsuccessfully traded sandalwood for his uncle John, arriving home in 1810.

[1][3] He also had a directorship in the newly created Bank of Australia, but at its collapse in 1843 Macarthur became insolvent, lost most of his property, and relocated to Ipswich, in the Moreton Bay District of the Colony of New South Wales (later the Colony of Queensland), where he was given a commission as police magistrate from 1 January 1852.

A son, John Alexander (January 1827 - June 23, 1904), married Clara Pollard and after her death, Mary Goodrich.