Thomas Henry Knight Moulder (25 May 1872 – 9 June 1920) was a Guyanese first-class cricketer.
Moulder was born at Georgetown in British Guiana in May 1872.
He played three first-class cricket matches for Demerara in the 1891–92 Inter-Colonial Tournament, playing twice against Barbados and once against Trinidad.
He scored 101 runs in his three matches, with a high score of 51.
He later played minor counties cricket in England for Oxfordshire between 1896–1902, making eighteen appearances in the Minor Counties Championship.