 Waterfall Gully is part of the state electoral district of Bragg, which has been held since 2002 by Liberal MP Vickie Chapman.In federal politics, the suburb is part of the division of Sturt, and has been represented by Christopher Pyne since 1993.The results shown are from the closest polling station to Waterfall Gully—which is located outside of the suburb—at St David's Church Hall on nearby Glynburn Road (Burnside).