Common short forms: C, RC
The Yearbook is the Canadian Catholic Directory or the Ontario Catholic Directory.
References for the Diocese of Peterborough Amell, William and Amell, Marie - Roman Catholic Diocese of Peterborough Reference Guide to Parish Registers 1826-1982 Boland, Edgar J - From the Pioneers to the Seventies: A History of the Diocese of Peterborough 1882-1975 - (1976) no ISBN, no publisher
In 1930, each parish was required to write and maintain a parish history although it seems not many did.
The registers for the entire diocese have been microfilmed. The complete set is available at TVA (the numbers starting with “FM” below) and at FHL (numbers given below).
History (as it affects Peterborough County)
| pre 1826 | Diocese of Quebec | |
| 1826 | Diocese of Kingston formed (included Peterborough Co) | |
| In 1826, there were 7 priests in Upper Canada, at Sandwich, Essex Co (1797); St Raphael, Glengarry Co (1802); Kingston (1808); Richmond, Carleton Co (1819); Perth (1820); York (Toronto) (1822); Malden, Essex Co. This was the year mass was first celebrated in Peterborough. | ||
| 1882 Jul 11 | Diocese of Peterborough formed | |
| 1904 | Diocese of Sault Ste Marie formed from part of Diocese of Peterborough |
Because some very early records for Peterborough County are found there, the parishes of Cobourg-St Michael and Campbellford-St Mary are included here.