Thomas Colby

Thomas Colby may refer to:


 * Thomas Colby (MP for Melcombe Regis) (1530–1588), English politician
 * Thomas Colby (MP for Thetford) (died 1588), MP for Thetford
 * Sir Thomas Colby, 1st Baronet (1670–1729), MP for Rochester
 * Thomas Frederick Colby (1784–1852), British major-general and director of the Ordnance Survey