Light rail or light rail transit (LRT) is urban public transport using rolling stock similar to a tramway, but operating at a higher capacity, and often on an exclusive right-of-way.

There is no standard definition, but in the United States, where the terminology was devised in the 1970s (from the engineering term light railway), light rail operates primarily along exclusive rights-of-way and uses either individual tramcars or multiple units coupled to form a train.