Thomas David Spearman (born 1937, known as David Spearman) is an Irish mathematical physicist who is Fellow Emeritus of Trinity College Dublin (TCD), where he spent his career and at various times served as head of the department of pure and applied mathematics, bursar, vice provost and pro-chancellor.

[6] In 1970 Spearman published the book Elementary Particle Theory (North Holland), co-written with A. D.

[7] In time, he served in numerous administrative roles, including head of the department of pure and applied mathematics (1966–1991), bursar (1974–1977), and vice provost (1991–1997).

He supervised three PhDs, authored of 400 years of Mathematics at TCD (1592–1992), and retired in 1997.

[5] He has remained active in college and other affairs, being TCD pro-chancellor and President of the Royal Irish Academy (1999–2002).