The 2019 Marsh One-Day Cup was the 51st season of the official List A domestic cricket competition in Australia.

The tournament saw matches played in Perth, Brisbane, Adelaide, Melbourne, Sydney, Gold Coast, and Hobart.

[1] Fox Cricket broadcast thirteen matches from the tournament.

[2] The tournament was sponsored by Marsh & McLennan Companies,[3] after previously being sponsored by Jardine Lloyd Thompson.

[4] Western Australia won the tournament, after they beat Queensland by four wickets in the final.