LEGO City 7939 Cargo Train

LEGO set 7939, “Cargo Train”, represents a freight train in the City theme, within the Trains subtheme. Released in 2010, it contains 839 pieces and presents an urban rail subject focused on cargo transport.

Set 7939 belongs to LEGO City and treats rail transport as part of a contemporary town setting. “Cargo Train” is not a licensed subject, but a general freight service, placing it squarely within the Trains subtheme and the broader City focus on everyday vehicles and public infrastructure.

The set includes 839 pieces and 4 minifigures. The listed characters are two workers with orange safety vests, blue legs, red helmets and glasses, one variant with silver glasses, a train machinist with a white torso, blue overalls and a blue hat, and a worker with a medium blue torso, blue overalls and glasses.

It is suited to City play layouts, LEGO train displays and collections built around rail transport. Among City Trains sets, it functions as a general cargo entry, useful for linking industrial areas, freight scenes and wider town layouts while keeping the emphasis on practical railway work.

Inventory of set 7939

The inventory of set 7939 lists 839 pieces, spare parts excluded: 234 different lots (one shape in one color) for 185 part shapes. The box also contains 26 spare parts, for small elements that are easy to lose.

Colors of set 7939

Main color: black, making up 21% of the parts, followed by yellow (20%) and dark bluish gray (18%).

Part types

Most common parts in set 7939

155 of the 185 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

Exclusive parts in set 7939

2 part shapes in set 7939 appear in no other set in the catalog, most often printed elements, stickers or molds specific to the model. If one gets lost, you will need to look for it individually, for example on BrickLink, rather than in another set. Counting colors, 3 lots in the set are not found in any other set.

Rebuilding set 7939 from another set

Share of the parts of set 7939 found in each of these similarly sized sets, counting shape, colour and quantity:

No similarly sized set goes above 25%: the model relies on a little-shared assortment, most of which has to be gathered piece by piece.

Size of set 7939 within its line

With 839 pieces, set 7939 ranks #55 out of 723 City sets in our database, which have an average of 306 parts. Among the 227 sets released in 2010, it ranks #28. That is 2.7 times the average City set size.