William Cleland, Scottish poet and soldier (b. 1661)
William Cleland may refer to:

William Cleland (poet) (c. 1661–1689), Scottish poet and soldier

William Cleland (surgeon) (1912–2005), Australian-born British cardiothoracic surgeon

W. Wallace Cleland (1930–2013), American professor of biochemistry

W. L. Cleland (William Lennox Cleland, 1847–1918), medical doctor in South Australia