Scott Ian (born Scott Ian Rosenfeld; December 31, 1963) is an American musician, best known as the rhythm guitarist, backing and additional lead vocalist, and the only remaining original founding member for the thrash metal band, Anthrax. He also writes the lyrics on all their albums. Ian is the guitarist and a founding member of the crossover thrash band Stormtroopers of Death. He has hosted The Rock Show on VH1 and has appeared on VH1's I Love the... series, and Supergroup (TV series). Ian is also the rhythm guitarist for the metal band The Damned Things.

Ian Scott may refer to:

• Ian Scott (American football) (born 1981)
• Ian Scott (artist) (1945-2013) New Zealand artist
• Ian Scott (Australian rules footballer) (born 1940)
• Ian Scott (cyclist), British silver medal winner at the 1948 Summer Olympics
• Ian Scott (footballer) (born 1967), English footballer
• Ian Scott (Manitoba politician), Green Party of Canada election candidate
• Ian Scott (Ontario politician) (1934–2006), politician in the Canadian province of Ontario
• Ian Scott (producer) (born 1982), American record producer
• Ian Scott (Rotarian) (1933–2001), founder of Australian Rotary Health, non-government funder of medical research
• Ian Scott (actor) (born 1973), French pornographic actor