The map above shows Arizona and Kentucky side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Arizona vs Kentucky Geography
Land area: Arizona has a land area of 113,655 square miles (294,366 km²), while Kentucky has 39,485 square miles (102,267 km²). Arizona's land area is 2.9 times (188%) larger than Kentucky's.
Total area: Arizona: 113,985 square miles (295,220 km²) vs Kentucky: 40,406 square miles (104,651 km²), including inland and coastal water. Arizona's total area is 2.8 times (182%) larger than Kentucky's.
Length: Arizona is 429 miles (690 km) long from north to south; Kentucky is 257 miles (414 km). Arizona's north-south length is 1.7 times (67%) longer than Kentucky's.
Width: Arizona spans 452 miles (727 km) east to west; Kentucky spans 418 miles (672 km). Arizona's east-west width is 1.1 times (8%) wider than Kentucky's.
Highest point: Arizona's highest point is Humphreys Peak at 12,620 feet (3,847 m); Kentucky's is Black Mountain at 4,134 feet (1,260 m). Humphreys Peak is 8,486 feet higher than Black Mountain.
Lowest point: Arizona's lowest point is Colorado River at 71 feet; Kentucky's is Mississippi River at 270 feet. Arizona's lowest point is 199 feet lower.
Arizona vs Kentucky Population and History
Population: Arizona has a population of 7,582,384 (2024), while Kentucky has 4,588,372 (2024). Arizona's population is 1.7 times (65%) larger than Kentucky's.
Population density: Arizona: 66.7 people per square mile vs Kentucky: 116.2. Kentucky's population density is 1.7 times (74%) higher than Arizona's.
Biggest city: Arizona's biggest city is Phoenix with 1,673,164 people; Kentucky's is Louisville with 640,796. Phoenix's population is 2.6 times (161%) larger than Louisville's.
Largest metro area: Arizona's largest metropolitan area is Phoenix-Mesa-Chandler, AZ metro area (5,186,958 people) vs Kentucky's Cincinnati, OH-KY-IN metro area (2,302,815). Phoenix-Mesa-Chandler, AZ metro area's population is 2.3 times (125%) larger than Cincinnati, OH-KY-IN metro area's.
History: Arizona: Admitted to the Union on February 14, 1912, as the 48th state. Kentucky: Admitted to the Union on June 1, 1792, as the 15th state. In its current form, Kentucky is the older of the two by 120 years.
Arizona vs Kentucky Economy
GDP: Arizona's GDP is $570.1 billion (2024) vs Kentucky's $295.4 billion. Arizona's economic output is 1.9 times (93%) larger than Kentucky's.
GDP per capita: Arizona: $75,186 per person vs Kentucky: $64,375. Arizona's GDP per capita is 1.2 times (17%) higher than Kentucky's.
Average income: Arizona: $65,798 vs Kentucky: $58,256 average income per person (per capita personal income). Arizona's average income is 1.1 times (13%) higher than Kentucky's.
Arizona vs Kentucky Counties
Number of counties: Arizona has 15 counties, while Kentucky has 120. Kentucky's county count is 8.0 times (700%) higher than Arizona's.
Biggest county by area: Arizona's largest county is Coconino County at 18,616 square miles; Kentucky's is Pike County at 786 square miles. Coconino County's land area is 23.7 times larger than Pike County's.
Smallest county by area: Arizona: Santa Cruz County (1,236 sq mi) vs Kentucky: Gallatin County (98 sq mi). Santa Cruz County's land area is 12.6 times larger than Gallatin County's.
Most populous county: Arizona: Maricopa County (4,673,096 people) vs Kentucky: Jefferson County (793,881 people). Maricopa County's population is 5.9 times (489%) larger than Jefferson County's.
Least populous county: Arizona: Greenlee County (9,410 people) vs Kentucky: Robertson County (2,382 people). Greenlee County's population is 4.0 times (295%) larger than Robertson County's.
Richest county: Arizona: Maricopa County ($72,176 per capita income) vs Kentucky: Oldham County ($87,137). Oldham County's income is 1.2 times (21%) richer than Maricopa County's.
Poorest county: Arizona: Graham County ($44,164 per capita income) vs Kentucky: Elliott County ($31,817). Graham County's income is 1.4 times (39%) richer than Elliott County's.
Arizona vs Kentucky Taxes
State income tax: Arizona has a top income tax rate of 2.5%, while Kentucky has a top income tax rate of 3.5%. Kentucky's top rate is 1 percentage points higher.
Property tax: Arizona: 0.43% effective rate vs Kentucky: 0.71% of home value per year. Kentucky's rate is 0.28 percentage points higher.
Sales tax: Arizona: 8.54% combined state and average local rate vs Kentucky: 6%. Arizona's combined rate is 2.54 percentage points higher.
Official Websites
Arizona official website · Kentucky official website
More Size Comparisons
All Arizona size comparisons · All Kentucky 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.