The following outline is provided as an overview of and topical guide to the U.S. state of Colorado:

Colorado – 22nd most populous, the eighth most extensive, and the highest in average elevation of the 50 United States. Colorado is one of the western Mountain States. The 30 highest major summits of the Rocky Mountains all rise within Colorado. The Territory of Colorado joined the Union as the 38th state on August 1, 1876.

Outline of Colorado

General reference

Names

Common name: Colorado

Pronunciation: Official name: State of Colorado Abbreviations and name codes Postal symbol: CO ISO 3166-2 code: US-CO Internet second-level domain: .co.us Nicknames Buffalo Plains State (in disuse) Centennial State (previously used on license plates) Colorful Colorado (previously used on license plates) Columbine State Highest State Lead State (in disuse) Mother of Rivers Rocky Mountain Empire Rocky Mountain State Silver State (in disuse; see Nevada) Switzerland of America Adjectival: Colorado Demonyms Coloradan Coloradoan (archaic)

Outline of Colorado

Geography of Colorado

Geography of Colorado

Colorado is: a U.S. state, a federal state of the United States of America

Location

Northern Hemisphere

Western Hemisphere

Americas

North America

Anglo America

Northern America

United States of America

Contiguous United States

Western United States

Mountain states

Southwestern United States

Population of Colorado: 5,029,196 (2010 U.S. Census) Population density of Colorado: 18.39 km−2 (estimate for 2008) Area of Colorado: 268,657.7 km2 Atlas of Colorado

Outline of Colorado

Places in Colorado

List of places in Colorado

List of Colorado municipalities

List of census designated places in Colorado

List of counties in Colorado

Historic places in Colorado

Forts in Colorado

List of ghost towns in Colorado

National Historic Landmarks in Colorado

National Register of Historic Places listings in Colorado

Bridges on the National Register of Historic Places in Colorado

National parks in Colorado

State parks in Colorado

National Natural Landmarks in Colorado

Environment of Colorado

Climate of Colorado

Protected areas in Colorado

State forests of Colorado

Superfund sites in Colorado

Wildlife of Colorado

Fauna of Colorado

Birds of Colorado

Mammals of Colorado

Reptiles

Snakes of Colorado

Natural geographic features of Colorado

List of lakes in Colorado

List of mountains of Colorado

Mountain ranges of Colorado

Mountain peaks of Colorado

The 100 highest major summits of Colorado

The 55 major 4000 meter summits of Colorado – major peaks over 13,123.4 feet elevation The 51 Colorado fourteeners – peaks over 14,000 feet elevation The 50 most prominent summits of Colorado The 40 most isolated major summits of Colorado Mountain passes of Colorado List of rivers of Colorado Drainage basins of Colorado National Natural Landmarks in Colorado