The map above shows Arizona and Colorado side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Arizona vs Colorado Geography
Land area
- Arizona has a land area of 113,655 square miles (294,366 km²), while Colorado has 103,637 square miles (268,419 km²).
- Arizona's land area is 1.1 times (10%) larger than Colorado's.
Total area
- Arizona: 113,985 square miles (295,220 km²) vs Colorado: 104,095 square miles (269,605 km²), including inland and coastal water.
- Arizona's total area is 1.1 times (10%) larger than Colorado's.
Length
- Arizona is 429 miles (690 km) long from north to south; Colorado is 467 miles (751 km).
- Colorado's north-south length is 1.1 times (9%) longer than Arizona's.
Width
- Arizona spans 452 miles (727 km) east to west; Colorado spans 387 miles (622 km).
- Arizona's east-west width is 1.2 times (17%) wider than Colorado's.
Highest point
- Arizona's highest point is Humphreys Peak at 12,620 feet (3,847 m); Colorado's is Mount Elbert at 14,422 feet (4,396 m).
- Mount Elbert is 1,802 feet higher than Humphreys Peak.
Lowest point
- Arizona's lowest point is Colorado River at 71 feet; Colorado's is Arikaree River at 3,326 feet.
- Arizona's lowest point is 3,255 feet lower.
Arizona vs Colorado Population and History
Population
- Arizona has a population of 7,582,384 (2024), while Colorado has 5,957,493 (2024).
- Arizona's population is 1.3 times (27%) larger than Colorado's.
Population density
- Arizona: 66.7 people per square mile vs Colorado: 57.5.
- Arizona's population density is 1.2 times (16%) higher than Colorado's.
Biggest city
- Arizona's biggest city is Phoenix with 1,673,164 people; Colorado's is Denver with 729,019.
- Phoenix's population is 2.3 times (130%) larger than Denver's.
Largest metro area
- Arizona's largest metropolitan area is Phoenix-Mesa-Chandler, AZ metro area (5,186,958 people) vs Colorado's Denver-Aurora-Centennial, CO metro area (3,052,498).
- Phoenix-Mesa-Chandler, AZ metro area's population is 1.7 times (70%) larger than Denver-Aurora-Centennial, CO metro area's.
History
- Arizona: Admitted to the Union on February 14, 1912, as the 48th state.
- Colorado: Admitted to the Union on August 1, 1876, as the 38th state.
- In its current form, Colorado is the older of the two by 36 years.
Arizona vs Colorado Economy
GDP
- Arizona's GDP is $570.1 billion (2024) vs Colorado's $557.6 billion.
- Arizona and Colorado have about the same economic output.
GDP per capita
- Arizona: $75,186 per person vs Colorado: $93,602.
- Colorado's GDP per capita is 1.2 times (24%) higher than Arizona's.
Average income
- Arizona: $65,798 vs Colorado: $83,055 average income per person (per capita personal income).
- Colorado's average income is 1.3 times (26%) higher than Arizona's.
Arizona vs Colorado Counties
Number of counties
- Arizona has 15 counties, while Colorado has 64.
- Colorado's county count is 4.3 times (327%) higher than Arizona's.
Biggest county by area
- Arizona's largest county is Coconino County at 18,616 square miles; Colorado's is Las Animas County at 4,773 square miles.
- Coconino County's land area is 3.9 times (290%) larger than Las Animas County's.
Smallest county by area
- Arizona: Santa Cruz County (1,236 sq mi) vs Colorado: Broomfield County (33 sq mi).
- Santa Cruz County's land area is 37.5 times larger than Broomfield County's.
Most populous county
- Arizona: Maricopa County (4,673,096 people) vs Colorado: El Paso County (752,772 people).
- Maricopa County's population is 6.2 times (521%) larger than El Paso County's.
Least populous county
- Arizona: Greenlee County (9,410 people) vs Colorado: Hinsdale County (747 people).
- Greenlee County's population is 12.6 times larger than Hinsdale County's.
Richest county
- Arizona: Maricopa County ($72,176 per capita income) vs Colorado: Pitkin County ($275,044).
- Pitkin County's income is 3.8 times (281%) richer than Maricopa County's.
Poorest county
- Arizona: Graham County ($44,164 per capita income) vs Colorado: Crowley County ($27,232).
- Graham County's income is 1.6 times (62%) richer than Crowley County's.
Arizona vs Colorado Taxes
State income tax
- Arizona has a top income tax rate of 2.5%, while Colorado has a top income tax rate of 4.4%.
- Colorado's top rate is 1.9 percentage points higher.
Property tax
- Arizona: 0.43% effective rate vs Colorado: 0.49% of home value per year.
- Colorado's rate is 0.06 percentage points higher.
Sales tax
- Arizona: 8.54% combined state and average local rate vs Colorado: 7.89%.
- Arizona's combined rate is 0.65 percentage points higher.
Official Websites
Arizona official website · Colorado official website
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More Size Comparisons
All Arizona size comparisons · All Colorado size comparisons
Area, elevation and boundary figures come from official national statistics and US Census Bureau and Natural Earth boundary data; US state population, economic, county and tax figures come from the US Census Bureau, the Bureau of Economic Analysis and the Tax Foundation. Figures are rounded and for general reference.