Denver Regional Council of Governments
- The regional planning agency for the eight-county Denver metropolitan area of nearly 2.2 million residents.
- http://www.drcog.org/

Pikes Peak Area Council of Governments
- A voluntary organization of local governments open to all general purpose local governments (municipalities and counties) in the Pikes Peak region (El Paso, Park and Teller Counties).
- http://www.ppacg.org/

Northwest Colorado Council of Governments
- An association of governments formed voluntarily to provide regional services and help members respond to the needs of a changing area.
- http://www.nwc.cog.co.us/