Cressida Clytie O'Hanlon (born 1972) is an Australian politician from the Labor Party.

[1] She has been a member of the South Australian House of Assembly since winning the 2024 Dunstan state by-election.

[2] She contested the same seat against Premier Steven Marshall in the 2022 state election.

[5] In the 2024 Dunstan by-election, O’Hanlon made political history when she became the first government-backed candidate to win a seat from the opposition in a South Australian by-election in more than 116 years.

[7] Cressida is married to James O'Hanlon, a 25-year veteran of the Australian Army.