Julian Smith may refer to:

• Julian C. Smith (1885–1975), United States Marine Corps general
• Julian Cleveland Smith (1878–1939), American-Canadian engineer and business executive
• Julian Sinclair Smith (1920–1993), American electrical engineer and television executive
• Julian Smith (politician) (born 1971), British MP and Former Northern Ireland Secretary
• Julian Smith (saxophonist) (born 1969), contestant on the third series of Britain's Got Talent
• Julian Smith (author) (born 1972), American author
• Julian Smith (footballer) (born 1967), Bahamian soccer defender
• Julian Smith (photographer), British-born Australian surgeon and Pictorialist photographer
• Julian Smith, British businessman, co-founder of Opes Prime
• Julian Smith (publisher) (born 1943), New Zealand businessperson

• Julian Horn-Smith (born 1948), British businessman