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

Named after the suburb of Croydon, it is a 18.78 km2 (7.25 sq mi) suburban electorate in Adelaide's inner north-west.

Croydon was created in the 1998 electoral distribution as a safe Labor seat, replacing the abolished Spence.

It was first contested at the 2002 state election, where it was won by future Attorney-General and Speaker Michael Atkinson, the previous member for Spence since 1989.

In February 2017, Atkinson announced his intention to resign from parliament and not recontest the seat as of the 2018 election.