Lynette Ruth "Lyn" Breuer (born 28 March 1951), Australian politician, represented the electoral district of Giles in the South Australian House of Assembly for the Australian Labor Party from 1997 to 2014. Breuer became Speaker of the South Australian House of Assembly for the Mike Rann and Jay Weatherill Labor governments following the 2010 election. Breuer was the first female Speaker of the South Australian House of Assembly from 2010 to 2013.
Before entering Parliament at the 1997 election, Breuer was a lecturer in Women’s Studies and Vocational Education at the Spencer Institute of TAFE. She was Junior Vice President of the Australian Labor Party.
Breuer did not re-contest her seat at the 2014 election.
She was elected as mayor of the City of Whyalla in August 2016.