Sir Euan Hamilton Anstruther-Gough-Calthorpe, 3rd Baronet (born 22 June 1966), a member of the Gough-Calthorpe family, is an English baronet and property manager who appears in the Sunday Times Rich List.

The son of Niall Hamilton Anstruther-Gough-Calthorpe (who died in 1970) and of his wife Martha Rodman, daughter of Stuart Warren Don, he was educated at Hawtreys, Savernake Forest, then at Harrow School and the Royal Agricultural College, Cirencester, where he gained a diploma in estate management.

In 1985, he succeeded his grandfather, Sir Richard Hamilton Anstruther-Gough-Calthorpe, 2nd Baronet (1908–1985).

He was President of the Birmingham Botanical Gardens from 1985 to 1999, a director of HTTP Technology Inc., 2000 to 2003, and of STG Holdings plc, 1999 to 2004.

In 2002, Anstruther-Gough-Calthorpe married Anna Joan Wright. Their children are: a son, Barnaby Charles Anstruther-Gough-Calthorpe (born 28 October 2005), who is heir to the baronetcy, a daughter, Flora Susan (born 29 April 2007), and another son Frederick Christopher Anstruther-Gough-Calthorpe (born 30 May 2009)

He is a first cousin of the actress Isabella Anstruther-Gough-Calthorpe.