Impact is a 1949 American film noir drama film starring Brian Donlevy and Ella Raines. Directed by Arthur Lubin, it was shot entirely in Northern California, including scenes in Sausalito at Larkspur in Marin County, on Nob Hill in San Francisco, and throughout the Bay area. The screenplay was based on a story by film noir writer Jay Dratler. Charles Coburn, Helen Walker, Anna May Wong, Philip Ahn, and William Wright appear in support.