In 1870, Hart became the inaugural president of the Port Adelaide Football Club,[2] and "Buck's Flat", in his father's Glanville Hall Estate property, was the club's home and site of many matches in its early years.

[2][3] The club's inaugural secretary was the longtime manager of Hart's Mill, William Leicester.

[4] Hart was also president of the Port Adelaide Rifle Club and a prominent member of the Adelaide Hunt Club, serving as Master of Fox Hounds for the years 1873 and 1876.

He was elected to the seat of Port Adelaide in the House of Assembly in 1880 but died the following year prior to the end of his term.

[6] In 1877 he married Emily Lavinia Finch (died 5 October 1939) on 8 August 1877.