All online casinos within the province must be registered with the Alcohol and [https://gigadatcasinologin.ca](https://gigadatcasinologin.ca/) Gaming Commission of Ontario (AGCO) and operate through iGaming Ontario (iGO). This not only ensures strong standards for player protection but secure payments, and a fair gaming system. All operators must secure agreementswith iGaming Ontario to legally offer online casino games and sports betting to Ontario residents. The law mandates strict player protection measures, including age verification, responsible gambling tools, fair gaming standards, and advertising restrictions. Below is our rundown of the best online casinos in Ontario, comparing factors such as game selection, payout speed, and mobile experience. No, casino winnings are not taxed in Ontario or anywhere in Canada. The Canada Revenue Agency considers gambling winnings as windfalls, not income, so they remain tax-free whether you win $100 or $1 million. This applies to online casinos, sports betting, lottery prizes, and land-based casino wins across all provinces.