The 4th Alpine Division "Monterosa" (Italian: 4ª Divisione alpina "Monterosa") was one of four divisions raised by Mussolini's Italian Social Republic. It existed from 1 January 1944 until 28 April 1945.
Monterosa is Italian taken from the name of the Monte Rosa, a mountain massif in the eastern part of the Pennine Alps, between Italy's and Switzerland's. Monte Rosa is the second highest mountain in the Alps and western Europe, after Mont Blanc.
The division was manned by Alpini troops, which were the mountain troops of the Kingdom of Italy, and later the Italian Republic.