This means that you can, in theory, only place parlay bets at Canadian betting sites. Note: Under the Canadian Criminal Code, bookmakers with a Canadian license are prohibited from offering single-event sport bets. It does add another layer of trustworthiness and security for players, though. Ideally, punters from Canada should opt to bet at an online betting site that is also licensed in Canada, but this is not a requirement to bet legally. By and large, however, gambling online is not illegal wherever in Canada you are.
In Canada, each province makes its own gambling laws. Some are licensed in the UK as well and a few even in Curacao. Those betting sites are usually licensed in Europe, such as Malta, Gibraltar or Sweden. Many betting sites online accept players from Canada.
There is a longer, more complicated answer to this question, however, and we need to get to that as well. The most important question first: is it legal to bet online in Canada?