Caucasia is a small city and municipality located in the subregion of Bajo Cauca Antioquia department, in Colombia.

Its territory is a flat area with small ridges in the north and west and south.

It is one of the largest municipalities in the area due to its advantageous location, near the confluence of major tributaries, such as the river Cauca and the Nechí y Paramillo National Park.

The highest altitude that represents the county is the mountain of Olvido (502 m) in Puerto Colombia.

The beginning and end of the year are dry seasons, but beyond that the weather is changeable, wet at certain times from August to November.