An elector is a person who is eligible to vote. Sounds simple, right? Well, different levels of government have different criteria for what constitutes an elector. Federally, one must be a Canadian citizen who is at least 18 years old on polling day. Want to vote in the next election? It’s likely that you’re already registered in the Elections Canada database since it’s usually automatic, but if you’re not sure you can check using the Online Voter Registration Service.