To reach the milestone, the left-handed batter took just 114 balls, making it the fastest double hundred in List-A cricket, overtaking Chris Gayle - who took 138 balls.
Head's 230* is the second-highest individual score in Australia's Marsh Cup after D'Arcy Short's 257. Travis Head previously smashed a double ton in 2015 against Western Australian.
Head's 230-run knock also helped South Australia score 391/8, their second-highest score in the history of the Marsh Cup.
