William Adam

William Adam may refer to:

• 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
• Professor William Adam (1796 – 1881) 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) (born 1917), American trumpeter, and professor emeritus at Indiana University
• William Augustus Adam (1865–1940), British and army officer and Conservative Party politician