Louis-Roch-Hector Fabre, CMG (French pronunciation: [ɛktɔʁ fabʁ]; August 9, 1834 – September 2, 1910) was a French Canadian lawyer, journalist, diplomat, and senator.

He was appointed to the Senate of Canada on 5 February 1875 on the recommendation of Alexander Mackenzie.

Sitting as a Nationalist, he represented the senatorial division of La Salle, Quebec until his resignation on 12 July 1882.

Following his resignation from the Senate, Fabre was appointed Canada's first General Agent in Paris, a position he would occupy until his death in 1910.

He was appointed editorial secretary of the journal Paris-Canada in February 1892 and editor two years later.