Pinus peregrinus is an extinct species of pine in the family Pinaceae known from Clarkforkian age Paleocene fossils found in western North Dakota, USA.

The Bear Den member outcrops at a number of sites in western North Dakota, and is designated the type locality.

Dr Hickey published the 1977 type description for P. peregrinus in the Geological Society of America memoir 150, Stratigraphy and Paleobotany of the Golden Valley Formation (Early Tertiary) of Western North Dakota.

Dr Hickey chose the specific name peregrinus, which is Latin meaning "stranger" or "newcomer" noting the species to be the first megafossil record for the pine family to be described from Rocky Mountains and Great Plains Paleocene rocks.

The needles provisionally included in P. peregrinus can reach up to 10 centimetres (3.9 in) long with a distinct midrib.