*Ian Fletcher (diplomat), Director of GCSB in New Zealand
*Ian Fletcher (literary critic) (1920–1988), British scholar
*Ian Fletcher (tennis) (born 1948), former tennis player from Australia
*Ian Fletcher, historian of the British Army during the early 19th century, especially in the Peninsular War campaign
*Ian Fletcher, the main character in the novel ''Keeping Faith'' by Jodi Picoult
*Ian Fletcher, the main character in the BBC comedy series ''Twenty Twelve'' and its follow-up ''W1A'', played by Hugh Bonneville
