The tram network of Budapest is part of the mass transit system of Budapest, the capital city of Hungary. The tram lines serve as the second most important backbone of the transit system (besides the bus network), carrying almost 100 million more passengers annually than the Budapest Metro.
In operation since 1866, the Budapest tram network is one of world's largest tram networks, operating on 156.85 kilometres (97.46 mi) of total route. As of 2014, it was composed of 33 lines (26 main lines, and 7 supplemental lines denoted by an "A" after the route number), and the Budapest Cog-wheel Railway. The system is operated by Budapesti Közlekedési Zrt. ("Budapest Transit LLC.") under the supervision of the municipal Budapesti Közlekedési Központ ("Budapest Transit Center").