Stephen Wastie Deblois (January 16, 1780 – December 26, 1844) was a businessman and political figure in Nova Scotia.
He represented Halifax township in the Nova Scotia House of Assembly from 1830 to 1836.
He was a member of the Halifax Chamber of Commerce and served as its vice-president.
Deblois defeated Beamish Murdoch to become a member of the provincial assembly in 1830.
His son George Wastie Deblois served in the assembly for Prince Edward Island.