Louis-Adélard Senécal (July 10, 1829 – October 11, 1887) was a Quebec businessman and political figure.

He was born Louis-Adélard Sénécal in Varennes, Lower Canada in 1829 and then moved to Verchères with his family while still very young.

However, he was forced to sell his share in the company after a series of fires left him short of liquid assets.

His son-in-law, Charles-Ignace Gill, a member of the Legislative Assembly of Quebec, helped provide Senécal with the required political connections for railway construction and also looked after some of Senécal's other business interests while he was otherwise occupied.

Senécal was also treasurer for the Parti conservateur du Québec during this period which many saw as a conflict of interest because of the heavy government involvement in railways at the time.