Thomas Whiteside (17 April 1857 – 28 January 1921) was an English prelate of the Roman Catholic Church.
[2] Thomas Whiteside was born in Lancaster, Lancashire on 17 April 1857, the son of Robert and Isabella Whiteside, of St George's Quay.
He attended the local parochial school, and was an altar boy at St. Peter's Church.
Whiteside was ordained to the priesthood on 30 May 1885 at St. John's Lateran in Rome,[3] and served as president of the diocesan seminary, St Joseph's College, Up Holland.
His consecration to the Episcopate took place on 15 August 1894,[3] the principal consecrator was Cardinal Herbert Vaughan, Archbishop of Westminster, and the principal co-consecrators were Bishop William Gordon of Leeds and Bishop John Bilsborrow of Salford.