William Adam may refer to:
William Adam (died c.1341), French archbishop and missionary William Adam (architect) (1689–1748), Scottish architect, mason, and entrepreneur William Adam of Blair Adam (1751–1839), Scottish member of the British parliament and judge William Patrick Adam (1823–1881), British colonial administrator and Liberal politician William Adam (minister) (1796–1881), Scottish Baptist minister, missionary, abolitionist William Adam (artist) (1846–1931), English landscape artist who worked in California for 33 years William Adam (malacologist) (1909–1988), Belgian malacologist William Adam (trumpeter) (1917–2013), American trumpeter, and professor emeritus at Indiana University William Augustus Adam (1865–1940), British and army officer and Conservative Party politician Will Adam (born 1969), Archdeacon of Canterbury Billy Adam, Scottish footballer
See also Bill Adam (born 1946), racing driver
William Adams (disambiguation)