The Ontario Landowners Association is an organization which seeks to protect property rights in Ontario, Canada. The OLA was formed "...to preserve and protect the rights of property owners." The organization seeks to cause laws and regulations, whether federal, provincial, or municipal, to be written so as to be more respectful of the rights of property owners. The Ontario Landowners Association also promotes the use of letters patent as a tool to aid in the protection of private property rights.
The Ontario Landowners Association was founded in December 2005 by delegates from twelve pre-existing landowners groups representing different rural areas of the province. The groups had already been cooperating closely, and for the most part were modeled on the Lanark Landowners Association, which had been conducting demonstrations and other activities since early 2003. A parallel group, the Renfrew Landowners Association, had existed since 2000 and had started the slogan, "This Land is Our Land: Back off Government" that would be adopted by the Lanark Landowners and eventually by the OLA. But it was the Lanark group that first tried to move beyond purely local issues and to recreate itself in different parts of the province.
The Lanark Landowners had grown out of an effort to set up a group to advise Scott Reid, the MP for Lanark, on agricultural issues. An initial meeting in April 2003, with Reid present, was held at the kitchen table of Merle Bowes, a Carleton Place farmer. Randy Hillier, who would go on to serve as the first president of the Lanark Landowners, was also present at the meeting. Bowes later observed that no matter what farm-related issue was being discussed at the meeting, "All the problems pointed back to property rights and that got us going."
The Lanark Landowners’ first action, in May 2003, was a demonstration to protest a property standards by-law in the town of Mississippi Mills. The next month, the group conducted an illegal out-of-season deer hunt to draw attention to the refusal of the Ontario Ministry of Natural Resources to permit farmers to cull deer who were eating their crops. Media were invited to the hunt and ministry officials were presented with a choice between three options: arresting the farmers, tolerating an ongoing violation of the law, or loosening the criteria for issuing out-of-season cull licences. Within weeks, the third option had been chosen, and the Landowners had won a high-profile victory.