John Adam may refer to: John Adam (architect) (1721–1792), Scottish architect John Adam (silversmith) (1774–1848), silversmith and painter in Virginia John Adam (administrator) (1779–1825), British administrator in India John Adam (legislator) (fl. 1860–1887), Wisconsin populist legislator from Milwaukee John Adam (sailor) (1875–1946), British sailor, won silver medal at 1908 Summer Olympics John A. Adam (journalist) (born 1949), American reporter John A. Adam (mathematician), British-American applied mathematician John Adam (rugby league) (born 1955), Australian rugby league player John Adam (actor) (born 1960s), Australian television and theatre actor John Adam (MP) (died 1440), for New Romney John Adam (hoax), the name given by Islamic militants to a U.S. soldier they claimed to have captured John J. Adam (1807–1888), Scottish-American teacher, businessman, and politician