South Australia's James Brister put on a good show in the final, but the Canberran speedster's bursts of speed in both heats proved too much.
“This is a bit surreal, I’ve been on the podium a fair few times but being able to put on the green and gold jersey for the first time is pretty special," Hart said.
“I came up against a really good mate of mine Patty Constable in the semi, so that was a tight battle, and with the short breaks between heats, it was definitely a tough day of racing.
“I knew James went to three in his semi-final so that took a bit of energy out of him, but he put up a really good fight, it was some good fun racing out there tonight.”
Hart's win continues his hot form this track season, sprinting to gold at the World Cup in New Zealand leg and finished a strong sixth at last month’s World Championships.
“There’s been a bit of a shift in my training over the last season, it’s skewed towards sprint more than it has in the past.
“I think my team sprint first wheel training over many years has helped me build up a good amount of horsepower and with some of the skills I’ve gained in the sprint has helped me end the season with some good results.”
South Australia's Constable defeated Victorian Conor Rowley in the ride for bronze.
In the women's sprint, Victoria's Caitlin Ward topped qualifying just .02 seconds ahead of time trial gold medallist New South Wales' Kaarle McCulloch (11.023).
For full results and race reports, visit Cycling Australia's dedicated track nationals website.