[5] Tarzia entered politics in 2010, serving as a Councillor of the City of Norwood Payneham & St Peters.

[6] Tarzia won the seat of Hartley at the 2014 state election, after defeating the Labor incumbent Grace Portolesi.

[8] On 6 October 2017, Nick Xenophon announced he would leave the senate and challenge Tarzia for the seat of Hartley in the 2018 state election.

[13] In December 2018, Tarzia became the first Australian Speaker to enable Question Time to be broadcast live on Facebook.

[18] Under the new law, South Australian drivers who have their car impounded have 38 days to pay their fine in full or face their vehicle being crushed or sold.

[20] In November 2020, Tarzia and the State Government delivered a $800,000 funding boost to Crime Stoppers SA.

[23] In April 2022, Tarzia assumed the shadow portfolios of Infrastructure and Transport and Recreation, Sport and Racing.