Theodore B. Basselin (1851–1914) was an American lumber magnate, best remembered for an endowed scholarship he created at the Theological College of the Catholic University of America.

Basselin attended Niagara University, graduating at the age of twenty-two before returning to his home town of Croghan, New York, and becoming involved in the timber trade.

[1] He quickly accumulated a fortune in the lumber trade, owning several thousands of acres of timberland and employing hundreds of people at the time of his death.

[1] An innovation which contributed to his success was his practice of using felled hemlock logs left to rot after they had been stripped of their bark for use in leather production.

During his tenure important progress was made in forest fire prevention, protection of state lands, and the establishment of the Adirondack Park.