There are several online forums where you can discuss Ontario Real Estate in Canada. Here are a few popular options:

RedFlagDeals Real Estate Forum - This is a popular forum where people discuss various aspects of real estate in Canada, including buying, selling, renting, and investing. You can find many threads related to Ontario Real Estate here.

Canadian Money Forum Real Estate - This forum has a section dedicated to real estate discussions, including discussions about Ontario Real Estate. Members can ask questions, share their experiences, and seek advice from other members.

BiggerPockets Real Estate Forums - Although this is an American-based forum, it has a section for Canadian real estate discussions. You can find many threads related to Ontario Real Estate here, and you can also learn from the experiences of real estate investors in other parts of North America.

Ontario Real Estate Investors Association (OREIA) - OREIA is an organization that provides education, networking, and support to real estate investors in Ontario. They have an online forum where members can discuss various aspects of real estate investing in Ontario.

These are just a few of the many online forums where you can discuss Ontario Real Estate in Canada. You can explore these options and find the one that best meets your needs.