Peter Martin Anker (June 20, 1801 – February 24, 1863) was a Norwegian landholder and politician.
Anker was born at Halden in Østfold, Norway. He was a son of wholesaler Niels Anker (1764–1812). He was also a third cousin of Karen Anker, wife of Johan Caspar Herman Wedel-Jarlsberg. Together with Thrine Gløersen (1814–1902) he had the children Nils Anker, Herman Anker, Christian August Anker and Dikka Møller. Grandchildren include Katti Anker Møller, Ella Anker and Johan Anker and great-greandchildren include Øyvind Anker, Synnøve Anker Aurdal, Peter Martin Anker and Tove Mohr.
Anker was a major landowner and held the manor house Rød herregård in Halden. Anker was married to Petronelle Didrikke Cathrine Tank (1806-1833) daughter of Carsten Tank. Following her death, he married Cathrine Olava Nicoline Gløersen (1814-1902).