The electoral district of Mordialloc is an electorate of the Victorian Legislative Assembly including the suburbs of Braeside, Mordialloc, Aspendale, Aspendale Gardens, Edithvale, Chelsea, Chelsea Heights and Parkdale; and parts of Keysborough and Mentone. The current member is Tim Richardson.
Mordialloc is part of the Melbourne Sandbelt and has traditionally been considered a Bellwether electorate. Its previous members include Liberal representatives Lorraine Wreford and Geoff Leigh, and Labor member Janice Munt.