Westphalen is a German surname. It may refer to:
People Ferdinand von Westphalen (1799–1876), German politician Jenny von Westphalen, wife of German philosopher Karl Marx Jens Westphalen (born 1964), German wildlife filmmaker, director and film producer Judith Westphalen, Peruvian painter Karl von Westphalen, German politician Ludwig von Westphalen, liberal German government official Marc Westphalen, German sprint canoer Otto Westphalen, German naval officer
Fictional Kristin Westphalen, character in SeaQuest DSV
Places Frederico Westphalen, city in Brazil Roman Catholic Diocese of Frederico Westphalen Westphalia or Westfalia is a region in Germany.
Science Westphalen-Lettré rearrangement