Sainte-Justine-de-Newton (French pronunciation: [sɛ̃t ʒystin də njutən]) is a municipality located in the Montérégie region of Quebec, Canada.

The municipality is situated on Route 325 south of Très-Saint-Rédempteur, just east of the Ontario border.

[1] Sainte-Justine-de-Newton was also named after Justine de Padoue.

[5] In 1845, the Township Municipality of Newton was formed, but abolished in 1847.

[1] List of former mayors:[10] Commission Scolaire des Trois-Lacs operates Francophone schools.