William Smyth (Pittston, Maine, 1797 – Brunswick, Maine, April 3, 1868) was a writer on mathematics and other subjects. He graduated from Bowdoin College in 1822, then studied theology at Phillips Academy Andover. In 1825, he became a professor of mathematics at Bowdoin College, and in 1846 became an associate professor of natural philosophy. The Bowdoin College Department of Mathematics Smyth Prize is named in his honor.
Smyth wrote several widely used textbooks: