Sir Louis-Olivier Taillon PC (French pronunciation: [lwi ɔlivje tajɔ̃]; September 26, 1840 – April 25, 1923) was a Canadian lawyer and politician.

This term came at the end of the Conservative government of his predecessor John Jones Ross.

Ross had lost the 1886 Quebec election, but had tried to cling to power in a minority government for a few more months.

He briefly returned to the practice of law, but following the removal of Liberal Honoré Mercier from office by the Lieutenant-Governor of Quebec, Taillon became minister without portfolio in the government of Charles-Eugène Boucher de Boucherville.

Taillon lived in the Institution des Sourdes-Muettes on Rue Saint-Denis in Montreal.