The line S7 () is a commuter rail route forming part of the Milan suburban railway service (), which converges on the city of Milan, Italy.
The route runs over the infrastructure of the MilanâÂÂMonza and the MonzaâÂÂMolteno railways and the section from Molteno to Lecco, opened on 20 November 1888, of the ComoâÂÂLecco railway. In the section from Molteno to Lecco it is also present another regional service train connecting Como and Lecco. Like all the other Milan suburban railway service routes, it is operated by Trenord.
Line S7, a radial route, heads initially in an northeasterly direction from Milan to Monza. From there, after Villasanta it turns north-west - away from the main railway to Lecco/Bergamo - and then, after Carate, turns north-east to Lecco. The travel takes 1h36'.
The route was activated on 14 December 2014, substituting the former R19 regional service. It is the sole line of the suburban service which runs on a section with a single track without electrification (line S9 also runs on a minor single track section, though it is completely electrified), so it is the sole line with a single ride per hour, running half-hourly only in peak hours and in the peak direction (Milan in the morning, Lecco in the evening).
The stations on the S7 are as follows (stations with a coloured background are within the municipality of Milan):