Pere Marquette 1225 is a class "N-1" 2-8-4 "Berkshire" type steam locomotive built in October 1941 for the Pere Marquette Railway (PM) by Lima Locomotive Works in Lima, Ohio. No. 1225 is one of two surviving Pere Marquette 2-8-4 locomotives, the other being 1223, which is on display at the Tri-Cities Historical Society near the ex-Grand Trunk Western (GTW) coaling tower, in Grand Haven, Michigan. It is perhaps most famous for serving as the basis for the locomotive in the 2004 film, The Polar Express.

The Pere Marquette Railway used No. 1225 in regular service from the locomotive's construction in 1941 until the railroad merged into Chesapeake and Ohio Railway (C&O) in 1947; it remained in use on C&O's Michigan lines until 1951. Slated for scrapping, 1225 was acquired by Michigan State University in 1957 and placed on static display.

In 1971, work began to restore No. 1225 to operational status, an effort that culminated in its first excursion run in 1988. The locomotive, listed on the National Register of Historic Places, is now used on excursion trains over the former Tuscola and Saginaw Bay Railway, now Great Lakes Central Railroad.