Henry Irwin CIE (24 January 1841–5 August 1922) was an architect of British India. He is mainly known for his works in Indo-Saracenic style of architecture. He was a member of the Institution of Engineers. He was awarded a CIE in the 1888 Birthday Honours
Irwin had three younger brothers, and two sisters. They included Alfred Macdonald Bulteel who was awarded a knighthood (for services in Burma).
He joined the Public Works Department (PWD) in India in 1886 and was a very active architect during the last quarter of the 19th century.
His works include: