Ontario has quickly established itself as Canada’s leader in regulated online gambling. Since the launch of its iGaming market, the province has set a high bar for player safety, platform integrity, and competitive offerings. With a wide range of licensed operators now available, players across Ontario—from downtown Toronto to smaller communities throughout the province—can access secure, reputable casino and sportsbook platforms tailored to local regulations. Our guide offers a detailed look at the top online gambling sites serving Ontario in 2025, with a focus on game quality, odds, user experience, and compliance. Whether you're interested in slots, table games, or sports betting, we’ve identified the most reliable options available to Ontario residents today.