The Reverend Joseph Robert Diggle JP (12 May 1849 – 16 June 1917) was a British Anglican clergyman, politician and public servant. He is notable for his campaign to change the law to allow clergymen to take seats in the House of Commons (although he was unable to win a seat himself), and for his chairmanship of the London School Board. His combative approach to political debate was the key to his career, helping him to run the Board for nine years but denying him any higher office.