Nully-Trémilly is a former commune in the Haute-Marne département of north-eastern France.
The two villages of Nully and Trémilly were merged from 1 December 1972 and 1 January 2005; they are now two separate communes.
Coordinates: 48°21′58″N 4°48′22″E / 48.36611°N 4.80611°E