Alyssa Kathleen Hayden (née Wallis; born 7 June 1970) is an Australian politician. Born in Perth, Hayden was a proprietor of a small business and a Senate staff member before entering politics. In 2008, she was elected to the Western Australian Legislative Council as a Liberal Party member, representing East Metropolitan Region. Her term began on 22 May 2009. She was defeated at the 2017 state election. After the 2021 election, Hayden started working in real estate sales.