Zachary Smith (or other forms such as Zac, Zach, Zack) may refer to:
People Arts and entertainment Armistead Burwell Smith IV, also known as Zach Smith, American rock musician with Three Mile Pilot and Pinback Zachary Smith (guitarist), American rock guitarist with The Loud Family, The Flying Monkeys, and Power13 Zachary Dylan Smith (born 1994), American actor Zack Smith, American rock guitarist and songwriter with Scandal Zak Smith (born 1976), American artist and alternative porn star Zachary Cole Smith (born 1984), American musician, model and music video director
Characters Zac Smith (Shortland Street), a fictional character on the New Zealand soap opera Shortland Street Zacharias Smith, a fictional character from the Harry Potter books by J.K. Rowling Zachary Smith, a fictional character originated by Jonathan Harris on the TV series Lost in Space
Military and industry Zach "Hoeken" Smith, a co-founder of RepRap and MakerBot Zachary D. Smith (1990–2010), a U.S. Marine Lance Corporal killed in Afghanistan, memorialized by Zachary Smith Post Office Zachary Smith Reynolds (1911–1932), American amateur aviator and tobacco industry heir
Sports Zac Smith (born 1990), Australian-rules footballer Zack Smith (born 1988), Canadian ice hockey player Zach Smith (American football) (born 1998), American football quarterback
Places Zachary Smith Post Office, in Hornell, New York