Saint-Roch-Ouest (French pronunciation: [sɛ̃ ʁɔk wɛst]) is a municipality in Montcalm Regional County Municipality in the Lanaudière region of Quebec, Canada.

Ouest is French for "west", indicating its position in relation to Saint-Roch-de-l'Achigan.

Saint-Roch-Ouest was formed in 1921 when it separated from the Parish Municipality of Saint-Roch.

All land of the municipality is occupied by agricultural activity, in particular vegetable production and the cultivation of cereals.

[5] Population trend:[6] Private dwellings occupied by usual residents: 97 (total dwellings: 102) Mother tongue: The Sir Wilfrid Laurier School Board operates anglophone public schools, including: