John Wynford Philipps, 1st Viscount St Davids Bt, GBE, PC, (30 May 1860 – 28 March 1938) was a British Liberal politician.
Philipps was the eldest son of Reverend Sir James Erasmus Philipps, 12th Baronet, Vicar of Warminster and Prebendary of Salisbury. He was the elder brother of Ivor Philipps and Owen Philipps, 1st Baron Kylsant, both also MPs, and of Laurence Philipps, 1st Baron Milford. He was educated at the Felsted School and at Keble College, Oxford, where he took a third-class honours degree in modern history in 1882. He studied law at the Middle Temple and was called to the Bar in 1886.
Philipps sat as Member of Parliament (MP) for Mid Lanarkshire from 1888 to 1895.
He did not defend his seat at the 1895 General Election. He sat for Pembrokeshire from 1898-1908. Four years before he succeeded his father in the baronetcy, he was raised to the peerage as Baron St Davids, of Roch Castle in the County of Pembroke. In 1918 he was further honoured when he was made Viscount St Davids, of Lydstep Haven in the County of Pembroke. He was appointed Knight Grand Cross of the Order of the British Empire in 1922.