'Freedom of information' (FOI) law is all about accessing government-controlled information. It is primarily statutory, and is closely related to the topic of Privacy Law. In fact, the primary Ontario statutes [there are two: the Freedom of Information and Protection of Privacy Act (FIPPA) and the Municipal version (MFIPPA)] combine the FOI and the privacy issues into single statutes (one for Ontario, and another one for it's 444 municipalities). These regimes - both for FOI and privacy purposes, and for both Ontario and municipal levels - are administratively governed by a single 'Information and Privacy Commissioner' (IPC) (which is cross-linked from the Privacy topic).
Canada has a similar statute - the Access to Information Act.