The township consists of two non-contiguous portions, separated by Limerick township and the northernmost portion of Tweed.The municipality is mostly rural.
History
Tudor Township was created circa 1865. Cashel Township was created circa 1869. Tudor and Cashel Townships were administered as one in 1897.
Limerick Township and Wollaston Township petitioned unsuccessfully for separation from Tudor Township in 1868. Wollaston Township was eventually formed circa 1880. Limerick Township was eventually formed in 1887 between today's Tudor and Cashel Townships. Geologically Limerick Township and Tudor Township are very similar, with valuable mineral resources.
After the separation of old Limerick Township, the townships of Tudor and Cashel were geographically separated since Limerick abutted along a corner of old Grimsthorpe Township (which was later amalgamated into the Municipality of Tweed).
In the 2021 Census of Population conducted by Statistics Canada, Tudor and Cashel had a population of 740 living in 352 of its 758 total private dwellings, a change of 26.3% from its 2016 population of 586. With a land area of 433.31 km (167.30 sq mi), it had a population density of 1.7/km (4.4/sq mi) in 2021.
Canada census – Tudor and Cashel community profile
^Limerick Township : Petition to separate from Tudor Township 9 December 1868 (Creation). Hastings County Historical Society (1957-). Repository: Community Archives of Belleville and Hastings County. File contains a manuscript report of the Hastings County Council Committee of Whole, 1868, finding against a petition for the separation of Wollaston and Limerick Townships from Tudor Township and the creation of separate township councils. Accessed 1 June 2020.
^"1971 Census of Canada - Population Census Subdivisions (Historical)". Catalogue 92-702 Vol I, part 1 (Bulletin 1.1-2). Statistics Canada: 76, 139. July 1973.
