Deas is a Scottish surname. People with this surname include:
Bob Deas, (1886-?), Australian rules footballer
Sir David Deas (1807–1876), medical officer in the Royal Navy
Charles Deas (1818–1867), American painter
Sir George Deas (1804–1887), Scottish judge
Jack Deas (1875-?), Australian rules footballer
James Deas (1890–1963), New Zealand politician
Justin Deas (born 1948), American actor
Lynn Deas, American bridge player
Paul Deas (born 1972), retired Scottish professional footballer
Sir Edward Deas Thomson (1800–1879), Australian politician
Zachariah C. Deas (1819–1882), brigadier general in the Confederate States Army during the American Civil War
