Herbert Roper Barrett, KC (24 November 1873 – 27 July 1943) was a tennis player from Great Britain.

At the London Olympics in 1908 Barrett won a gold medal in the men's indoor doubles event with Arthur Gore.

He played his first Wimbledon singles' competition in 1898, reaching the second round in which he lost to eventual finalist Laurence Doherty.

In 1908 he reached the All comers final, beating Anthony Wilding and Major Ritchie before losing in five sets to Arthur Gore.

He achieved his best Wimbledon singles result in 1911 when he beat Parke and Gordon Lowe before winning the All-Comers final against compatriot Charles P. Dixon.