The 2018–19 CSA Provincial One-Day Challenge was a List A cricket competition that took place in South Africa from 7 October 2018 to 7 April 2019.

[1][2] The tournament was played in parallel with the 2018–19 CSA 3-Day Provincial Cup, a first-class competition which featured the same teams.

[3] The competition was played between the thirteen South African provincial teams.

However, in October 2018 they withdrew from South Africa's provincial competitions, citing issues around costs and logistics.

[6] Easterns won the tournament, after they beat Northerns by two wickets in the final.