Colico (Comasque: Còlich [ˈkɔlik] or Còlegh [ˈkɔlek]; Latin: Colicum) is a town and comune in the province of Lecco, in Lombardy in northern Italy. It is situated on the northern arm of Lake Como, where the river Adda enters the lake. Colico is the largest town in the northern part of Lake Como, which is often identified as its Colico branch.^{[citation needed]}

Colico is a local transport hub, with boats to Como and Lecco, as well as trains and roads to Milan (via the eastern shore of the lake, Lecco and Brianza), to Chiavenna, and eastwards to Bolzano, via Passo dello Stelvio.

The Abbey of Piona on the Olgiasca peninsula lies within the comune.

Colico is dominated by Monte Legnone, at 2,609 metres (8,560 ft) above sea level, and high foothills. Near Colico is an important natural reserve, the migration corridor of the Pian di Spagna (in the province of Como). The two main waterways of Colico are Inganna and Perlino; the river Adda is a natural boundary between the provinces of Como and Lecco.

The whole area was fortified during the Middle Ages, before the construction of the Fort Fuentes. On the northern Montecchio hill are still visible two guard towers, which formed the so-called Castle Colico, built in the Medieval commune period to control the road from Valtellina. The most important from a strategic point of view was Fontanedo Tower, part of a more complex work of fortification built during the 14th century by Visconti. From the tower it was possible to dominate the Upper Lake, the hinterland of Colico and the area of the Lake Mezzola. In defense of the ancient road linking Lake Como with Valtellina, within the territory of Curcio, there is another lookout tower, now transformed into a farm house and called the Curcio tower.

Another part of the defense system is Fortino d'Adda, or Stallone, located out of the border municipalities in the territory of Gera Lario. Its unique structure has slots for the shot of a firearm and a brick bridge that connects the main entrance to the plain. It is currently used for storage. Another fort is placed in the territory of Olgiasca. It is a casaforte ("stronghouse", or fortified house), which from the top of the hill controls the town below. It is known as the Castle of Mirabello and it is thought to have been built in the first half of the 16th century.

Roccoli, or bird snares, are tree architectures, equipped with nets placed vertically, which surround a sort of stone tower from which the hunting was run. They have long been formidable weapons to catch birds which, at the approaching of winter, migrate southwards. This activity was economically important for Colico, placed on the route of the flocks. Of the many bird snares active until about forty years ago, are still well preserved those located near Piona and along the road that goes up to the Fort Fuentes.

Traces of painting, particularly in the apse, are due to an unknown painter from the early 15th century. They include the Christ Pantocrator, flanked by the prophets Jeremiah and Isaiah. A restoration campaign held in recent years discovered an interesting fresco depicting the Last Supper.