Hartley is a single-member electoral district for the South Australian House of Assembly.

It is a 15.65 km2 suburban electorate in Adelaide's northeast, taking in the suburbs of Campbelltown, Hectorville, Magill, Newton, Paradise and Tranmere.

Hartley was created at the electoral redistribution of 1976 as a marginal Labor seat, and was first contested at the 1977 state election by then Deputy Premier Des Corcoran, who had moved from the more marginal seat of Coles after a redistribution erased Labor's majority there.

Believing this made Hartley unwinnable, Groom tried to gain preselection for a safer seat, only to be turned down.

The seat subsequently fell to Groom's 1989 challenger, Joe Scalzi at the 1993 election amid that year's massive Liberal landslide.