Peter Marius Hansen (13 May 1868, Faaborg - 6 October 1928, Faaborg) was a Danish painter who became one of the Fynboerne or "Funen Painters" group living and working on the island of Funen.
Hansen attended the Copenhagen Technical School before studying under Kristian Zahrtmann at the Kunstnernes Frie Studieskoler (1884 - 1890). His travels included the Netherlands (1892 and 1909), and several periods in Italy from 1899 where he was in Civita d'Antino with Zahrtmann (1904) and in Pompei with Theodor Philipsen (1919 - 21). He also travelled to Belgium and Paris in 1909. His eldest son, David Shane Hansen (1888-1909) would become one of the leading organizers of the 1909 general strike in Barcelona, Spain. He was killed by military forces July 27th 1909. Peter Hansen would comment that his son had become a great martyr in the rising Spanish Anarchist movement that was sweeping Spain. It was during this time that Peter's art began to reflect the pain he suffered at the loss of his son.