William James (1842–1910) was a pioneering American psychologist and philosopher.
William James may also refer to:
William James (bishop) (1542–1617), English academic and bishop of Durham, 1606–17
William James (Kent MP), Member of Parliament for Kent, 1654–59
Sir William James, 1st Baronet (1720–1783), British naval commander
William James (railway promoter) (1771–1837), assisted in promotion of the Liverpool and Manchester Railway
William James (naval historian) (1780–1827), British naval historian during the Age of Sail
William James (Carlisle MP) (1791–1861), Member of Parliament for Carlisle 1820–1826 and 1831–35 and East Cumberland 1836–47
Sir William Milbourne James (judge) (1807–1881), British judge
William H. James (1831–1920), second governor of Nebraska
William James (photographer) (1866–1948), British-Canadian photographer
William P. James (1870–1940), U.S. federal judge
W. Frank James (1873–1945), U.S. Representative from Michigan
Sir William James (Royal Navy admiral) (1881–1974), British admiral, author and artist's model
William G. James (1892–1977), Australian pianist, composer and pioneering Australian Broadcasting Commission broadcaster
William James (Australian rules footballer) (1900–1966), Australian football player
William James (rugby league), rugby league footballer of the 1920s and 1930s
William S. James (1914–1993), State Treasurer of Maryland
William James (general) (1930–2015), Australian (army) general and military physician
William James (American football) (born 1979), American football player (formerly known as Will Peterson)
William james his life and philosophy 