Peter Motzfeldt (3 August 1777 – 1 April 1854) was a Norwegian military officer and government minister.

He was the son of infantry captain Ulrik Anton Motzfeldt (1738–83) and Andrea Birgitte Bull.

He was later stationed in the Danish West Indies and was held as a prisoner of war by Great Britain.

[2] In 1814, he was elected as a representative from the Bergen Artillery Corp (Artillerie-Corpset) at the National Assembly in Eidsvoll.

Their daughter, Jacobine Ida Sophie Motzfeldt, married politician Christian Birch-Reichenwald.