Samuel William Manthey (1774 – 4 August 1815) was a Norwegian jurist and politician.
He was elected to the first session of the Parliament of Norway in 1814, representing the constituency of Smaalenenes Amt.
[1] Together with Elisabeth Antonette de Stockfleth (1777–1857) he had the son August Christian Manthey (1811–1880), a notable politician and writer, who married a daughter of Jacob Nielsen [no].
Samuel William Manthey was also the son-in-law of Thomas Rosing de Stockfleth.
[2][3] Another son, Ludvig Johan Carl Manthey (1809–1875), married another daughter of Jacob Nielsen.