The Congress of Colima is a unicameral legislature.

The Congress consist of 25 local deputies (16 elected by the first-past-the-post system and 9 by proportional representation).

Deputies are elected to serve for a three-year term.

Since its installation the congress has been renewed 59 times, hence the current session of the Congress of Colima (whose term lasts from 2021 to 2024) is known as the LX Legislature.

The LX Legislature of the Congress of Colima consists of 25 deputies.