Several steamships have borne the name Westfalen, after the Westphalia region in Germany:
- SS Westfalen (1894) was a 1,227 ton cargo ship launched on 20 March 1894, by Grangemouth Dockyard Company, Grangemouth, Scotland. Renamed Nestor in 1898 and Vladimir in 1912. Wrecked off Cape Serrat, French protectorate of Tunisia, on 31 March 1933.
- SS Westfalen (1900) was a 2,384 ton cargo ship completed in March 1901, by Neptun Werft in Rostock, Germany. Renamed Zemlya in 1914 and five more times after that. Broken up as Olivia in 1957 at Rosyth, Scotland.
- SS Westfalen (1905) was a 5,098 ton cargo ship launched on 14 November 1905, by J.C. Tecklenborg in Geestemünde, Germany. Rebuilt as seaplane tender in 1933. Mined and sunk off Marstrand, Sweden, on 7 September 1944.
- SS Westfalen (1907) was a 385 ton passenger ship built in 1907 by Jos. L. Meyer in Papenburg, Germany. Converted to minesweeper in 1942 and renamed M.3802. Bombed and sunk by Royal Air Force aircraft off Saint-Nazaire, France, on 15 June 1944.
- SS Westfalen (1912) was built as the 170 ton minesweeper FM-29 in 1919, by Nobiskrug in Rendsburg, Germany. Converted to cargo ship and renamed Westfalen in 1925. Renamed Montijense in 1932. Wrecked at some point after 1958.