Walter Francis Roch (20 January 1880 – 3 March 1965), sometime MP (Lib.) for Pembrokeshire from 1908 to 1918 was a Welsh politician and landowner, whose political career ended when he continued to support Asquith over David Lloyd George. He was also a barrister at the Middle Temple from 1913.
Roch was born the second son of William Francis Roch, J.P., of Butter Hill, Pembrokeshire (who died 1889) and his wife Emily Catherine Powell (she d. 1938), the second daughter of a Welsh Liberal politician Walter R.H. Powell, of Maesgwynne, Llanboidy, Carmarthenshire, MP (Lib.) for Carmarthenshire, 1880–85, and West Carmarthenshire, 1885-89. He was educated at Twyford School and Harrow School. At the age of 28, in 1908, he successfully contested for the seat in Pembrokeshire and was re-elected continuously until 1918.
In 1916 he was appointed to the Dardanelles Commission.
He married 20 April 1911 Hon. Fflorens Mary Ursula Herbert (1879- ), daughter of Ivor Herbert, 1st Baron Treowen and eventually his sole heiress. Issue, if any, unknown.
In 1934, Roch was appointed JP for Monmouthshire. He and his wife spent the last twenty five years of his life on their estates.