Richard Alphonsus O'Connor (April 15, 1838 – January 23, 1913) was a Canadian priest and Bishop of Peterborough, Ontario.

Born in Listowel, County Kerry, Ireland on April 15, 1838, O'Connor emigrated to Canada with his parents in 1841, settling in Toronto.

His first charge after ordination was as assistant priest at Toronto Gore, and in January 1862, he was appointed pastor of that mission.

In December 1865, he was transferred to Niagara Falls mission, and in September 1868, he was entrusted with the parish of South Adjala, Ont.

In October 1870, he was made Dean of Barrie, where he remained for over eighteen years, taking a leading position in educational matters.