Newmark is a surname. Notable people with the surname include:
Andy Newmark, American musician
Betsy Newmark, high school teacher and blogger
Bobby Newmark, fictional character in novel
Brooks Newmark (born 1958), British politician, Member of Parliament for Braintree
Craig Newmark, founder of Craigslist
Dave Newmark, former basketball player
Harris Newmark, former businessman and historian
Joseph Newmark (1799–1881), Prussian-born American rabbi.
Nathan M. Newmark, structural engineer
Peter Newmark (1916–2011), an English professor of translation