St.Thomas College. - ආදි විදුහල්පතිවරු

1844–1848	Mr. N. J. Ondatjee
1848–1852	Mr. Abraham Dias Abeysinghe
1852 –1854	Mr. John Stevensen Lyle
1854–1856	Mr. F. H. De Winton
1856–1858	Mr. Fedrick Dias Edirisinghe
1858 – 1860	Mr. Quancy Adams
1860–1865	Mr. Clement La–brooy
1865–1866	Mr. A. W. Wijesinghe
1866–1872	Mr. W.E.Ferdinando
1872–1878	Mr. R.O. Macalam
1878–1884	Mr. F.K. Dency
1884–1890	Mr. J. W. Bultjens
1890–1896	Mr. R. C. Reginold
1896–1902	Mr. L. A. Arndt
1902 – 1903	Mr. S. J. Gunasekeram
1903–1910	Mr. C.P. Fernando
1910–1915	Mr. J. C. Handy
1915–1925	M. S. Solomon
1925–1934	Mr. P.S.Adams
1934–1944	Mr. C. C. P. Arulpragasam
1944–1952	Mr. R. V. L. Pereira
1952–1959	Mr. J. E. M. Fernando
Government Principals
1960–1975	Mr. K. B. Jayasuriya
1975–1985	Mr. E. A. L. W. Samarasinghe
1985–1999	Mr. B. G. Sisira
1999–2011	Mr. Ratnasiri Suraweera
2011–2022	Mr. W. B. Piyathissa