Elections were held in the organized municipalities in the Cochrane District of Ontario on October 25, 2010 in conjunction with municipal elections across the province.
Incumbent mayor Mike Milinkovich was narrowly re-elected in Black River-Matheson, winning just 22 votes more than challenger Joanne Barber in a race that was very nearly an even three-way split. Five of the township's six councillors, Willie Dubien, Darrell Pettefer, Jerry Cashmore, Bob Renaud and Gisele Desmarais, won by acclamation; André Gadoury won over Charmaine Moffat to take the only contested council seat.
Peter Politis was elected mayor of Cochrane. Jane Skidmore-Fox, Robert Hutchinson, Darryl Owens, Gilles Chartrand, Bob Bawtinhimer and Christina Farquhar-Leigh were elected to council.
There were no council elections in Fauquier-Strickland, as the entire council, consisting of mayor Madeleine Tremblay and councillors Gilles Fortin, Gilles Pineault, Roger Brunet and Sylvie Albert, won by acclamation.
Incumbent mayor Roger Sigouin was re-elected in Hearst. Only two of the town's six incumbent councillors, André Rhéaume and Marc Dufresne, ran for re-election to their council seats; two councillors, Katrina Carrera and Marc Dupuis, challenged Sigouin in the mayoral race, and two incumbents did not seek re-election. Both Rhéaume and Dufresne were re-elected to council, and will be joined by new councillors Jonathan Blier, Daniel Lemaire, Conrad Morin and Gaétan Longval.
Incumbent mayor Gilles Forget was re-elected in Iroquois Falls. Michael Shea, Tory Delaurier, Terry Boucher, Pat Britton, Gilbert Fournier and Yves Carrière were elected to council.
Incumbent mayor Alan Spacek was acclaimed back into office in Kapuskasing. Emilie Lemieux, David Plourde, Laurier Guillemette, Martin Credger, Martin Dinnissen and Yvon Guertin were elected to council.
Incumbent mayor Jean-Louis Brunet was acclaimed back into office in Mattice-Val Côté; however, all of the town's incumbent councillors were defeated. The new council will consist of Michel Brier, Nathalie Lamoreaux, Richard Lemay and Réjean Mitron.