Overmyer is a surname. Notable people with the surname include:
Amanda Overmyer (born 1984), American rock singer-songwriter Arthur W. Overmyer (1879–1952), American politician and judge Bill Overmyer (born 1949), American football player David Hicks Overmyer (1889–1973), American muralist Daniel H. Overmyer (1924–2012), American businessman Daniel L. Overmyer (1935–2021), Canadian historian of Chinese religion Eric Overmyer (1951–2026), American writer and producer Robert F. Overmyer (1936–1996), test pilot, naval aviator, aeronautical engineer, physicist, United States Marine Corps officer and astronaut
See also Overmyer Network, an American television network from 1966 to 1967