Sarah Marshall (born 1955) is a stage actress working primarily in the Washington, D.C. region. She has been nominated for the Helen Hayes Award seventeen times and won the award in 1989.

Marshall was born in Kansas, the fifth of eight children in a Catholic military family. During her childhood, she lived in several places in the South. Most of her family currently resides in the south..

As a child, Marshall and her siblings produced plays at their home. Marshall decided to become an actress in the seventh grade after winning a citywide monologue competition in Huntsville, Alabama. Playing the comedic role of the maid in her middle school's production of Junior Miss led her to focus on character acting. She acted throughout high school and college, graduating from Birmingham-Southern College with a degree in theater.