Roserio is a district ("quartiere") of Milan, Italy, part of the Zone 8 administrative division of the city.

In the 2000s, the Roserio CMP has been largely criticized for poor service, long delays and lost packages.

Under Napoleonic rule, it became part of Bollate, to regain its autonomy with the advent of the Kingdom of Lombardy–Venetia.

[2] After being annexed to Milan, the area of Roserio changed rapidly from a rural to a suburban environment.

A major development of the area occurred with the construction of the Luigi Sacco hospital and connections to the A4 and Laghi motorways.