William Putnam may refer to: William LeBaron Putnam (1835–1918), Maine lawyer and politician and United States federal judge William Lowell Putnam (1861–1923), American lawyer and banker Bill Putnam (1920–1989), American audio engineer Bill Putnam (basketball) (1922–1992), American basketball player William Lowell Putnam III (1924–2014), alpinist, author and broadcasting executive Will Putnam (born 2000), American football player