Catherine Barclay (born 12 June 1973) is a former professional tennis player from Australia.

In her professional career, she won three ITF titles in singles and thirty in doubles.

On 30 August 2000, she was awarded the Australian Sports Medal for her strong commitment to tennis.

In 2003, she married field hockey player Christopher Reitz of Germany, and they reside in Sydney, Australia.

She once sat next to Linda Morris on a plane who chewed her ear off after a few rosés.