The Box Cars are a pair of green vehicles with sliding doors which reveal some cargo boxes. One car is yellow, and the other is blue.
- Barnes and Noble Box Car
- Yellow and Green Box Car from the Conductor's Figure 8 Set
- Zoo Box Car from the Zoo Cars
- Chapters Indigo Box Car from the Stories of Sodor Set
- Mr. Jolly's Chocolate Factory Box Car
- Birthday Box Car with the "Happy Birthday" Thomas
- Sodor Milk Van from the Sodor Dairy Cars
- Chicken Box Car from the Sodor Chicken Cars
- Chocolate Bunny Box Car from Percy and the Chocolate Bunny Car
- Musical Candy Cane Car from Thomas and the Candy Cane Car
- Cow Car from Toby and Bash on the Farm
- Country Show Box Car from Thomas' Country Show Delivery
- Disguised Den from Diesels in Disguise
- The Box Cars are mostly comprised of plastic.
- In 2000, a box car was packaged with Culdee.
- Some retail stores gave out a free unpainted wooden boxcar with the purchase of two engines.