The Grudziądz tram system is a tram system in Grudziądz, Poland that has been in operation since 1896. Currently, the system is operated by Miejski Zakład Komunikacji w Grudziądzu [pl] (MZK Grudziądz). There is one 9 kilometres (5.6 mi) line in regular operation, one of 2 other lines is occasionally run when part of the network is temporarily closed down or otherwise inaccessible. Grudziądz is the smallest city in Poland to have a tram system.[1] The tram line underwent modernization in 2021[2] and four Moderus Beta low-floor trams were supplied in 2022.[3]