Coles was an electoral district of the House of Assembly in the Australian state of South Australia from 1970 to 2002.
Coles was first contested at the 1970 election and was won by Labor's Len King as a marginal seat.
King retired before the 1975 election and was succeeded by Deputy Premier Des Corcoran, who transferred to Coles after his majority in Millicent was redistributed away.
A boundary redistribution ahead of the 1977 election pushed the seat into Liberal-friendly territory in the Adelaide Hills.
Believing this made Coles impossible to hold, Corcoran moved to the newly created neighbouring seat of Hartley.