Gwen O'Mahony won the nomination over two rivals.
She ran in the 2009 provincial election and lost to Liberal MLA Barry Penner, whose recent resignation paved the way for a byelection.
O'Mahony also ran in the last federal election and placed a distant second to Conservative Mark Strahl.
Names of Liberal candidates vying for the Chilliwack-Hope nomination have not yet been announced.
No date has been set for the byelection.