Koleč is a village in Central Bohemian Region of the Czech Republic. It is located about 19 km northwest of Prague an 11 km northeast of Kladno and has a population of 588 (2006). Hamlets of Týnec and Mozolín, both located in a neighbouring valley just under remains of early medieval fortified settlement of Budeč, are administrative parts of Koleč.
The first mention of the village dates back to 12th century. In a document from about 1125-1140 it was stated to be in property of the Vyšehrad Chapter.
There is a small Baroque chateau with chapel of Holy Trinity in Koleč, built in the 1710s on the site of an older fort. The chapel, serving as a church for the growing village, was enlarged in 1898-1899. The privately owned chateau has been neglected and heavily dilapidated since the 1990s. Now it belongs among the most endangered listed buildings in the region.