Joseph Gurney Barclay (9 February 1879 – 15 April 1976) was a British banker and Evangelical Anglican missionary.
His first wife was Gillian Birbeck whom he married on 25 May 1905 in Freebridge Lynn, Norfolk.
His second wife was Gwendoline Rose Watney (1885-1976) who was already a missionary in Japan with YWCA.
Their son Oliver Barclay (1919 – 2013) was a British academic and prominent evangelical Christian.
An obituary written by the Bishop of Worcester, Robin Woods was published in The Times.