Showalter

• Albert Kenneth Showalter Meteorologist; invented the Showalter Stability Index
• Anthony Johnson Showalter, an American gospel music composer, teacher and publisher
• Buck Showalter, a former professional baseball player and current manager of the Baltimore Orioles
• Dennis Showalter, American historian
• Daniel Showalter, California miner and state legislator, duelist, secessionist, soldier for the Confederate States of America in Texas
• Don Showalter, a professor and former chairman of the Department of Chemistry at the University of Wisconsin–Stevens Point
• Elaine Showalter, an American literary critic, feminist, and writer on cultural and social issues
• Gena Showalter, an American author in the genres of contemporary romance, paranormal romance and young adult
• Jackson Showalter, a 5-time U.S. Chess Champion
• Joseph Baltzell Showalter, a Republican member of the U.S. House of Representatives from Pennsylvania
• Mark R. Showalter, an American astronomer
• Max Showalter, an American film, television and stage actor
• Michael Showalter, an American actor, writer, and director and part of the sketch comedy trio Stella
• William Showalter, American chairmaker