Ontario Maps

Online Maps

 * The Changing Shape of Ontario: A Guide to Boundaries, Names and Regional Governments Archives of Ontario
 * 1788-1899 - Archives of Ontario The Evolution of the District and County System 1788-1899
 * 1884-1924 - Historical Maps of Toronto Includes Goad's Atlas of Toronto 1884-1924
 * The Atlas of Canada
 * The Canadian County Atlas Digital Project
 * Cartes historiques canadiennes
 * The W. A. Pugsley Collection of Early Canadian Maps
 * Map archives, Natural Resources Canada
 * 1874-1881 - McGill University Canadian County Atlas Project
 * 43 Ontario County Atlases c. 1874-1881 (as of April 2014)
 * searchable by surname, county, township, town, map.

FamilySearch
The Family History Library has a small collection of Ontario maps and atlases. Among these is a very useful series of outline maps which give county and township boundaries and the names of county seats:
 * Hancocks, Elizabeth. Townships and County Seats of Ontario. Toronto, Ontario: Ontario Genealogical Society, [197-?]. (Family History Library .)

Illustrated Historical Atlases
For some southern Ontario counties, illustrated historical atlases show farm lots and concession numbers with the names of landowners in the late 1860s and 1870s.
 * Atlases listed in the FamilySearch Catalog
 * Atlases of Ontario Province and counties Digitized online.
 * The new topographical atlas of the province of Ontario, Canada : ... comprising ... a correct and complete series of separate county maps on a large scale, showing lots and concessions, railways, post offices, opened and closed roads, churches, school-houses ... together with maps of the chief cities and county towns ..(1879) Digitized online.
 * Historical County Atlases This is a comprehensive collection of atlases at the Archives of Ontario.
 * Ontario, Canada Land Gazetteer, 1875-81 lists the name, and sometimes the birth year, of more than 17,000 individuals extracted from Atlases of Ontario Canada, from 1875 to 1881. The entries in this database are not complete transcriptions of the original records. For those of you who would like to purchase a more detailed electronic transcript for a particular entry, highlight the information you found for the record you want, then copy and paste it into an e-mail to transcripts@ingeneas.com., along with your name and address. You will be contacted with additional information.
 * For the location of copies of these atlases available at other repositories, view the WorldCat Online Catalog. Many are also available on microfilm. Most of Ontario's illustrated historical atlases are indexed in:
 * The Central Canadians, 1600-1900, 3 vols. (Toronto: Genealogical Research Library, 1994). . . This index is in the FHL Canada reference area. Look in the back of each volume for the keys to localities and sources.
 * Canadian Genealogy Index, 1600s-1900s.

Archives of Ontario

 * The Changing Shape of Ontario: A Guide to Boundaries, Names and Regional Governments Archives of Ontario
 * 1788-1899 - Archives of Ontario The Evolution of the District and County System 1788-1899

Library and Archives Canada

 * Explore Our Maps