A field cornet () is a term formerly used in South Africa for either a local government official or a military officer. Originally, the term was used for a civilian official in a local government district (Drostdy) of the Cape Colony, acting as and invested with the authority of a military officer and empowered to act as a magistrate. The field cornet was subject to the landdrost of the district and acted as his representative. As such, a field cornet performed important functions in administrative, judicial and police matters. In addition, in peacetime the field cornet was the head of the militia and was responsible for maintaining law and order in his area.