Willard Thomas Sears (November 5, 1837 – May 21, 1920) was a prominent New England architect of the nineteenth and early twentieth centuries who worked primarily in the Gothic Revival and Renaissance Revival styles. In 1861, Sears opened an architectural studio with Charles Amos Cummings. Together as Cummings and Sears, they designed many significant buildings, primarily ecclesiastical and academic, in and around Boston, including Brechin Hall and the Stone Chapel at Phillips Academy in Andover, the Old South Church on Copley Square (1875), and the Cyclorama (1884).