The map above shows Arizona and Pennsylvania side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Arizona vs Pennsylvania Geography
Land area: Arizona has a land area of 113,655 square miles (294,366 km²), while Pennsylvania has 44,742 square miles (115,882 km²). Arizona's land area is 2.5 times (154%) larger than Pennsylvania's.
Total area: Arizona: 113,985 square miles (295,220 km²) vs Pennsylvania: 46,054 square miles (119,279 km²), including inland and coastal water. Arizona's total area is 2.5 times (148%) larger than Pennsylvania's.
Length: Arizona is 429 miles (690 km) long from north to south; Pennsylvania is 284 miles (458 km). Arizona's north-south length is 1.5 times (51%) longer than Pennsylvania's.
Width: Arizona spans 452 miles (727 km) east to west; Pennsylvania spans 307 miles (495 km). Arizona's east-west width is 1.5 times (47%) wider than Pennsylvania's.
Highest point: Arizona's highest point is Humphreys Peak at 12,620 feet (3,847 m); Pennsylvania's is Mount Davis at 3,210 feet (978 m). Humphreys Peak is 9,410 feet higher than Mount Davis.
Lowest point: Arizona's lowest point is Colorado River at 71 feet; Pennsylvania's is Delaware River at 0 feet. Pennsylvania's lowest point is 71 feet lower.
Arizona vs Pennsylvania Population and History
Population: Arizona has a population of 7,582,384 (2024), while Pennsylvania has 13,078,751 (2024). Pennsylvania's population is 1.7 times (72%) larger than Arizona's.
Population density: Arizona: 66.7 people per square mile vs Pennsylvania: 292.3. Pennsylvania's population density is 4.4 times (338%) higher than Arizona's.
Biggest city: Arizona's biggest city is Phoenix with 1,673,164 people; Pennsylvania's is Philadelphia with 1,573,916. Phoenix's population is 1.1 times (6%) larger than Philadelphia's.
Largest metro area: Arizona's largest metropolitan area is Phoenix-Mesa-Chandler, AZ metro area (5,186,958 people) vs Pennsylvania's Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area (6,330,422). Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area's population is 1.2 times (22%) larger than Phoenix-Mesa-Chandler, AZ metro area's.
History: Arizona: Admitted to the Union on February 14, 1912, as the 48th state. Pennsylvania: Admitted to the Union on December 12, 1787, as the 2nd state. In its current form, Pennsylvania is the older of the two by 125 years.
Arizona vs Pennsylvania Economy
GDP: Arizona's GDP is $570.1 billion (2024) vs Pennsylvania's $1,007.9 billion. Pennsylvania's economic output is 1.8 times (77%) larger than Arizona's.
GDP per capita: Arizona: $75,186 per person vs Pennsylvania: $77,062. Arizona and Pennsylvania have about the same GDP per capita.
Average income: Arizona: $65,798 vs Pennsylvania: $70,678 average income per person (per capita personal income). Pennsylvania's average income is 1.1 times (7%) higher than Arizona's.
Arizona vs Pennsylvania Counties
Number of counties: Arizona has 15 counties, while Pennsylvania has 67. Pennsylvania's county count is 4.5 times (347%) higher than Arizona's.
Biggest county by area: Arizona's largest county is Coconino County at 18,616 square miles; Pennsylvania's is Lycoming County at 1,229 square miles. Coconino County's land area is 15.1 times larger than Lycoming County's.
Smallest county by area: Arizona: Santa Cruz County (1,236 sq mi) vs Pennsylvania: Montour County (130 sq mi). Santa Cruz County's land area is 9.5 times (849%) larger than Montour County's.
Most populous county: Arizona: Maricopa County (4,673,096 people) vs Pennsylvania: Philadelphia County (1,573,916 people). Maricopa County's population is 3.0 times (197%) larger than Philadelphia County's.
Least populous county: Arizona: Greenlee County (9,410 people) vs Pennsylvania: Cameron County (4,348 people). Greenlee County's population is 2.2 times (116%) larger than Cameron County's.
Richest county: Arizona: Maricopa County ($72,176 per capita income) vs Pennsylvania: Chester County ($110,883). Chester County's income is 1.5 times (54%) richer than Maricopa County's.
Poorest county: Arizona: Graham County ($44,164 per capita income) vs Pennsylvania: Forest County ($30,234). Graham County's income is 1.5 times (46%) richer than Forest County's.
Arizona vs Pennsylvania Taxes
State income tax: Arizona has a top income tax rate of 2.5%, while Pennsylvania has a top income tax rate of 3.07%. Pennsylvania's top rate is 0.57 percentage points higher.
Property tax: Arizona: 0.43% effective rate vs Pennsylvania: 1.16% of home value per year. Pennsylvania's rate is 0.73 percentage points higher.
Sales tax: Arizona: 8.54% combined state and average local rate vs Pennsylvania: 6.34%. Arizona's combined rate is 2.2 percentage points higher.
Official Websites
Arizona official website · Pennsylvania official website
More Size Comparisons
All Arizona size comparisons · All Pennsylvania 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.