Mary Casillas Salas is an American politician from Chula Vista, California. She is a former California Assembly member who represented the 79th Assembly District from 2006 to 2010. She ran for the California State Senate in 2010 but lost. In 2012 she was elected to the Chula Vista City Council, a position she previously held from 1996 to 2004. She was elected Mayor of the city of Chula Vista in 2014.

California's 79th State Assembly district is one of 80 California State Assembly districts. It is currently represented by Democrat Akilah Weber of La Mesa, who was elected on April 6, 2021 following the resignation of Democrat Shirley Weber, who assumed the position of California Secretary of State.