This is a list of francophone communities in Ontario. Municipalities with a high percentage of French-speakers in the Canadian province of Ontario are listed.

The provincial average of Ontarians whose mother tongue is French is 3.3%, with a total of 463,120 people in Ontario who identify French as their mother tongue in 2021. The majority of Franco-Ontarians in Ontario live in eastern and northeastern Ontario. While most communities in these areas have sizeable French minorities, several municipalities have francophone majorities.

Most such places are designated as French language service areas under the provincial French Language Services Act, meaning that Government of Ontario services must be available in French.

A number of small municipalities also have high francophone populations. These include the francophone-majority municipalities of Dubreuilville (79%), Fauquier-Strickland (68%), Mattice-Val Côté (82%), Opasatika (63%), and Val Rita-Harty (71%).

Small francophone-minority municipalities include Baldwin (11%), Billings (10%), Brethour (10%), Calvin (10%), Casey (42%), Chamberlain (6%), Chapleau Cree Fox Lake (8%), Charlton and Dack (5%), Cobalt (13%), Coleman (25%), Dokis (10%), Dorion (5%), Evanturel (9%), Gauthier (17%), Harley (28%), Harris (30%), Head, Clara and Maria (6%), Hornepayne (10%), Hilliard (21%), Hudson (18%), James (19%), Jocelyn (7%), Kerns (11%), Larder Lake (19%), Latchford (11%), Matachewan (17%), Matachewan (15%), Mattagami (5%), Mattawan (26%), McGarry (38%), Nairn and Hyman (9%), Temagami (13%), The North Shore (15%), Papineau-Cameron (22%), Spanish (18%), Thornloe (28%), and White River (13%).