IA, Ia, or ia may refer to:
Sir Ian Murray McKellen (born 25 May 1939) is an English actor. He is the recipient of six Laurence Olivier Awards, a Tony Award, a Golden Globe Award, a Screen Actors Guild Award, a BIF Award, two Saturn Awards, four Drama Desk Awards, and two Critics' Choice Awards.
Ian Edward Wright, (born 3 November 1963) is an English former professional footballer and television and radio personality.
Ian Lancaster Fleming (28 May 1908 – 12 August 1964) was an English author, journalist and naval intelligence officer who is best known for his James Bond series of spy novels.
The IAV (Interim Armored Vehicle) Stryker is a family of eight-wheeled armored fighting vehicles derived from the Canadian LAV III.
Ian Richard Kyle Paisley, Baron Bannside (6 April 1926 – 12 September 2014), was a loyalist politician and Protestant religious leader from Northern Ireland.
Ian Kevin Curtis (15 July 1956 – 18 May 1980) was an English singer-songwriter and musician. He was the lead singer and lyricist of the post-punk band Joy Division.
Sir Ian Terence Botham, OBE (born 24 November 1955) is an English former cricketer and current cricket commentator.
Ian Douglas Smith (8 April 1919 – 20 November 2007) was a politician, farmer, and fighter pilot who served as Prime Minister of Rhodesia (or Southern Rhodesia; today Zimbabwe) from 1964 to 1979. As the country's first premier that was not born abroad, he led the predominantly white government that unilaterally declared independence from the United Kingdom in 1965, following prolonged dispute over the terms.