Motz is a surname. Notable people with the name include:
- Anna Motz (born 1964), consultant clinical and forensic psychologist
- Diana Gribbon Motz (born 1943), United States Circuit Judge
- Dick Motz (1940–2007), New Zealand cricketer
- Frank Motz (1869–1944), American baseball player
- Glen Motz (born 1958), Canadian politician
- Hans Motz (1909–87), Austrian-born physicist in the United Kingdom
- J. Frederick Motz (1942–2023), senior United States District Judge
- Lloyd Motz (1909–2004), American astronomer
- Lotte Motz (1922–1997), Austrian-American scholar
- Roger Motz (1904–64), Belgian politician
- Walter Motz, German cross country skier of the 1930s
- Wilhelm Amsinck Burchard-Motz (1878–1963), German lawyer and politician