Light is an electoral district of the House of Assembly in the Australian state of South Australia. As its area overlaps or is adjacent to the south western portion of the Light Regional Council and the south bank of the Light River, it is indirectly named after Colonel William Light, the first Surveyor-General of South Australia. The electorate was created in 1857, abolished at the 1902 election and recreated at the 1938 election. Covering a total area of 459.7 km², Light consists of Gawler, surrounding areas and rural areas to the north, extending south of the Gawler River through to the far outer northern Adelaide suburbs of Munno Para West and parts of Munno Para Downs. It is classed as a rural seat.