The township was officially established in 1816 and named in honour of Charles Pierrepont, 1st Earl Manvers. At that time land grants were made to United Empire Loyalists, retiring soldiers and other friends of the crown. In 1974, an extensive re-organization of municipal administrative divisions took place. Durham County was separated from Northumberland County, renamed the Regional Municipality of Durham and incorporated most of the former Ontario County; in the process, Manvers Township was transferred to the County of Victoria.
Effective January 1, 2001, Victoria County was dissolved and its municipalities and townships were amalgamated; the new administrative municipal division was named the City of Kawartha Lakes.
- The Trail Through The Bush - A brief history of Manvers Township by Sherrell Branton Leetooze. copyright 1998, L.M-J Associates.
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- Province of Ontario -- A History 1615 to 1927 by Jesse Edgar Middletwon & Fred Landon, copyright 1927, Dominion Publishing Company, Toronto.