William Calder may refer to:
Politicians
edit- William M. Calder, American politician
- William Henderson Calder, New Zealand politician
- William Calder (1767–1829), Lord Provost of Edinburgh 1810-11
Others
edit- William Calder (footballer), Scottish footballer
- William Calder (engineer) (1860–1928), from New Zealand
- William Calder, of the Calder baronets