1963-1969 - Front de libération du Québec (FLQ) starts a bombing campaign at the average rate of one every ten days. Targets included English owned businesses, banks, McGill University and the homes of prominent English speakers.
1963 FLQ bombing of Canadian Army Recruiting Centre in Montreal, killing Sgt. Wilfred V. O'Neil.
late 1960s - FLQ places a bomb in a window well of the National Defence Headquarters on Lisgar St in Ottawa, Ontario. The explosion killed a cleaning lady.
late 1960s - FLQ places a bomb in a mailbox next to the Canadian Tire store on Wellington St in Ottawa, Ontario.
February 13, 1969 - FLQ sets off a powerful bomb that rips through the Montreal Stock Exchange causing massive destruction and seriously injuring twenty-seven people.
October 5, 1970 - British diplomat James Cross and October 10 Quebec Minister of Labour Pierre Laporte are kidnapped by the FLQ in Montreal. (The dead body of Pierre Laporte was discovered in the trunk of a car in Montreal, Quebec on October 17, 1970; Cross was released on December 3, 1970.)
2000 - The Brigade d'autodéfense du français bombs a church where an English fundraiser was to be held.
2001 - Quebec - The FLQ/The Brigade d'autodéfense du français firebombs three "Second Cup" locations in Montreal. They were targeted because of the company's use of its incorporated English name "Second Cup". Rhéal Mathieu, a previously convicted FLQ terrorist was convicted for all three bombings. Seven McDonald's restaurants were also firebombed.
2012 - The night of the Quebec provincial elections, Richard Bain, an anglophone Quebecer attempted to assassinate Parti Québécois leader and Premier elect Pauline Marois at a victory gathering in Montreal. He also set fire to the Metropolis concert hall where the event was being held. A man was killed and another was injured in the terrorist act. It is said that Bain's ultimate goal was to kill Marois following the Parti Québécois victory. Bain, who was arrested shortly after the attack, is currently incarcerated and awaiting his trial.
2006 - In the 2006 Ontario terrorism plot, Canadian counter-terrorism forces arrested 18 people (dubbed the "Toronto 18") tied to Al Qaeda. They were accused of planning to detonate truck bombs, to open fire in a crowded area, and to storm the Canadian Broadcasting Centre, the Canadian Parliament building, the Canadian Security Intelligence Service (CSIS) headquarters, and the parliamentary Peace Tower, to take hostages and to behead the Prime Minister and other leaders.
2013 - The head of Canada’s spy service Richard Fadden has told Parliament that the fragmenting of al-Qaeda has made him more “worried” about terrorist attacks in Canada. He warned that Canadians are involved in every al-Qaeda affiliate group and that these groups have mentioned Canada as a possible target.
2013 Chiheb Esseghaier and Raed Jaser of Montreal and Toronto respectively charged as part of an alleged Al Queda in Iran plot to derail a New York to Toronto train on the Canadian side of the border. Alleged plot was not imminent. Canadian Muslims helped to foil the alleged plot. Iran has denied involvement and the suspects said they were arrested based on their appearance. 
January 29, 1965 - Two U.S. jets (F-84s) being overhauled by Northwest Industries in Edmonton, Alberta were destroyed and a third damaged when a left-wing group protesting the Vietnam War dynamited the planes; a security guard was killed during the incident. See also Edmonton aircraft bombing.
May 18, 1966 - Paul Joseph Chartier's attempt to bomb the House of Commons fails when the device goes off prematurely in a Centre Block washroom.