Katherine Walker (née Katharina Görtler; November 25, 1848 – February 5, 1931) was a German-American lighthouse keeper. Walker tended the Robbins Reef Light in New York Harbor for more than 30 years after the death of her husband, Captain John Walker, who had been appointed keeper of the light in 1885. Katherine Walker was appointed the official keeper of the light by President Benjamin Harrison in 1890, four years after her husband's death. During her tenure she rescued 50 or more sailors from shipwrecks.