King won five of the first seven tournaments she contested in 1974. She won the Virginia Slims of San Francisco, defeating Nancy Richey Gunter in the semi-finals and Chris Evert in the final. The following week in Indian Wells, California, King again defeated Gunter in the semi-finals but lost to Evert in the final. King then won tournaments in Fairfax, Virginia and Detroit before losing a semi-final match to Virginia Wade in Chicago. King won both tournaments she played in March, defeating Gunter in the Akron, Ohio final and Evert at the U.S. Indoor Championships final. Olga Morozova then upset King in her next two tournaments, at Philadelphia in the final and at Wimbledon in a quarterfinal 7–5, 6–2. Afterward, King did not play a tour match until the US Open, where she won her fourth singles title and third in the last four years. She defeated Rosemary Casals in a straight sets quarterfinal, avenged in the semi-finals her previous year's loss to Julie Heldman, and narrowly defeated Evonne Goolagong in the final. King did not reach a tournament final during the remainder of the year, losing to Heldman in an Orlando semi-final, Wade in a Phoenix semi-final, and Goolagong in a semi-final of the tour-ending Virginia Slims Championships in Los Angeles.