The capital of Colorado is Denver.
The Postal Code for Colorado: CO
Typical abbreviations for Colorado: Col., Colo.
Time Zone:
The state of Colorado is in the Mountain Time (MST/MDT) zone and observes daylight saving time.
| Note: |
Starting in 2007, Daylight Savings Time will be begin 3 weeks earlier and end 1 week later.
Click here for details. |
When the people of Colorado refer to themselves: Coloradan or Coloradoan
Population: According to the 2006 Census estimates, Colorado has a population of 4,753,377 people.
This represents 1.59% of the national total, making it the 22nd most populous state.
The following are population changes since the last Census. The population counts after year 2000 are estimates.
| Year | Population | Change |
| 2006 | 4,753,377 | +1.93% since 2005 |
| 2005 | 4,663,295 | +1.41% since 2004 |
| 2004 | 4,598,507 | +1.12% since 2003 |
| 2003 | 4,547,633 | +1.06% since 2002 |
| 2002 | 4,500,122 | +1.62% since 2001 |
| 2001 | 4,428,562 | +2.96% since 2000 |
| 2000 | 4,301,261 | Last Census Count |
Area:
The area of Colorado is 104,094 square miles (269,602.22 km²).
This represents 2.74% of the national total.
Colorado ranks as the 8th largest state.
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Density:
The population density of Colorado is 45.83 people per square mile (17.69 people/km²).
Colorado ranks 37th in population density.
Nicknames for Colorado: "The Centennial State"; "Colorful Colorado"
State Motto: "Nil Sine Numine" (Nothing without Providence)
State Bird: Lark Bunting (calamospiza melanocorys)
State Tree: Blue Spruce (picea pungens)
State Flower: Rocky Mountain Columbine (aquilegia caerules)
State Song: "Where the Columbines Grow"
Statehood:
Colorado became the 38th state on Aug 1, 1876.
Useful State Links
The state website for Colorado can be found at:
The portal for Colorado tourism:
For information about Colorado fishing regulations and licenses requirements:
For information about Colorado hunting regulations and licenses requirements:
Communities Ranked by Population (Top-15)
 
| Rank | City | 2005
Population | National
Rank |
| 1 | Denver | 557,917 | 25 |
| 2 | Colorado Springs | 369,815 | 48 |
| 3 | Aurora | 297,235 | 61 |
| 4 | Lakewood | 140,671 | 149 |
| 5 | Fort Collins | 128,026 | 191 |
| 6 | Centennial | 98,243 | |
| 7 | Arvada | 103,966 | |
| 8 | Pueblo | 103,495 | |
| 9 | Westminster | 105,084 | |
| 10 | Boulder | 91,685 | |
| 11 | Thornton | 105,182 | |
| 12 | Greeley | 87,596 | |
| 13 | Longmont | 81,818 | |
| 15 | Loveland | 59,563 | |
Miscellaneous Information
| Census Region: 4 (West) |
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| Census Division: 8 (Mountain) |
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| State FIPS-55 Code: 08 |
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| Office of Management and Budget (OMB): Region VIII / Region 8 |
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| ISO-3166-2 Code: US-CO |
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