Thomas March Clark (July 4, 1812 – September 7, 1903) was an American Episcopal prelate who served as Bishop of Rhode Island between 1854–1903 and Presiding Bishop of the Episcopal Church between 1899 and 1903.

Thomas March Clark was born at Newburyport, Massachusetts on July 4, 1812.

[1] He graduated at Yale College in 1831, studied theology at Princeton, and was licensed to preach as a Presbyterian in 1835.

His Reminiscences appeared in 1895; among his other works are Early Discipline and Culture (1852), and Primary Truths of Religion (1869).

He died in Newport, Rhode Island on September 7, 1903, at age 91.