Colonial elections were held in Australia on 9 April 1890. All 52 seats in the South Australian House of Assembly were up for election. The incumbent government led by Premier of South Australia John Cockburn defeated the opposition led by Leader of the OppositionThomas Playford II. Each district elected multiple members, with voters casting multiple votes. From the first elections in 1856 until 1890, no parties or solid groupings had been formed, resulting in regular changes of Premier depending on who could garner the most confidence votes from every independent MP.
House of Assembly (FPTP) — Turnout 53.10% (Non-CV) — Informal N/A