Ian Simpson

Ian Simpson may refer to:


 * Ian Simpson (architect) (born c. 1956), English architect
 * Ian Simpson Architects, an English architecture practice established in 1987 by Ian Simpson and Rachel Haugh
 * Ian Simpson (motorcyclist) (born 1970), motorcycle road racer from Scotland
 * Ian Simpson (long jumper), British athlete and champion at the 1993 UK Athletics Championships
 * Kevin Abstract (Clifford Ian Simpson, born 1996), American rapper