Ludvig Johan Carl Manthey (1809–1875) was a Norwegian civil servant.
He graduated as cand.jur. in 1834. After a career in a Norwegian government ministry, he was appointed stipendiary magistrate (byfoged) in Tromsøe in 1855. From 1859 to his death in 1875 he held the same position in Trondhjem.[1]
He was a brother of August Christian Manthey, the government minister.[1]