[2] In 1935 as part of the Vautrin Settlement Plan, the place was colonized by pioneers from Saint-Antoine-sur-Richelieu, Saint-Hyacinthe, and Salaberry-de-Valleyfield.

La Rochebaucourt was a cavalry captain of the Régiment de Languedoc in General Montcalm's army.

[1] Mother tongue (2021):[4] List of former mayors:[6] Provincially it is part of the riding of Abitibi-Ouest.

In the 2022 Quebec general election the incumbent MNA Suzanne Blais, of the Coalition Avenir Québec, was re-elected to represent the population of Rochebaucourt in the National Assembly of Quebec.

In the 2021 Canadian federal election, the incumbent Sébastien Lemire of the Bloc Québécois was re-elected to represent the population Rochebaucourt in the House of Commons of Canada.