The map above shows New Mexico and Pennsylvania side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
New Mexico vs Pennsylvania Geography
Land area: New Mexico has a land area of 121,313 square miles (314,198 km²), while Pennsylvania has 44,742 square miles (115,882 km²). New Mexico's land area is 2.7 times (171%) larger than Pennsylvania's.
Total area: New Mexico: 121,593 square miles (314,925 km²) vs Pennsylvania: 46,054 square miles (119,279 km²), including inland and coastal water. New Mexico's total area is 2.6 times (164%) larger than Pennsylvania's.
Length: New Mexico is 395 miles (635 km) long from north to south; Pennsylvania is 284 miles (458 km). New Mexico's north-south length is 1.4 times (39%) longer than Pennsylvania's.
Width: New Mexico spans 498 miles (801 km) east to west; Pennsylvania spans 307 miles (495 km). New Mexico's east-west width is 1.6 times (62%) wider than Pennsylvania's.
Highest point: New Mexico's highest point is Wheeler Peak at 13,150 feet (4,008 m); Pennsylvania's is Mount Davis at 3,210 feet (978 m). Wheeler Peak is 9,940 feet higher than Mount Davis.
Lowest point: New Mexico's lowest point is Red Bluff Reservoir at 2,842 feet; Pennsylvania's is Delaware River at 0 feet. Pennsylvania's lowest point is 2,842 feet lower.
New Mexico vs Pennsylvania Population and History
Population: New Mexico has a population of 2,130,256 (2024), while Pennsylvania has 13,078,751 (2024). Pennsylvania's population is 6.1 times (514%) larger than New Mexico's.
Population density: New Mexico: 17.6 people per square mile vs Pennsylvania: 292.3. Pennsylvania's population density is 16.6 times higher than New Mexico's.
Biggest city: New Mexico's biggest city is Albuquerque with 560,326 people; Pennsylvania's is Philadelphia with 1,573,916. Philadelphia's population is 2.8 times (181%) larger than Albuquerque's.
Largest metro area: New Mexico's largest metropolitan area is Albuquerque, NM metro area (926,303 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 6.8 times (583%) larger than Albuquerque, NM metro area's.
History: New Mexico: Admitted to the Union on January 6, 1912, as the 47th 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.
New Mexico vs Pennsylvania Economy
GDP: New Mexico's GDP is $147.1 billion (2024) vs Pennsylvania's $1,007.9 billion. Pennsylvania's economic output is 6.9 times (585%) larger than New Mexico's.
GDP per capita: New Mexico: $69,046 per person vs Pennsylvania: $77,062. Pennsylvania's GDP per capita is 1.1 times (12%) higher than New Mexico's.
Average income: New Mexico: $58,249 vs Pennsylvania: $70,678 average income per person (per capita personal income). Pennsylvania's average income is 1.2 times (21%) higher than New Mexico's.
New Mexico vs Pennsylvania Counties
Number of counties: New Mexico has 33 counties, while Pennsylvania has 67. Pennsylvania's county count is 2.0 times (103%) higher than New Mexico's.
Biggest county by area: New Mexico's largest county is Catron County at 6,924 square miles; Pennsylvania's is Lycoming County at 1,229 square miles. Catron County's land area is 5.6 times (463%) larger than Lycoming County's.
Smallest county by area: New Mexico: Los Alamos County (109 sq mi) vs Pennsylvania: Montour County (130 sq mi). Montour County's land area is 1.2 times (19%) larger than Los Alamos County's.
Most populous county: New Mexico: Bernalillo County (671,747 people) vs Pennsylvania: Philadelphia County (1,573,916 people). Philadelphia County's population is 2.3 times (134%) larger than Bernalillo County's.
Least populous county: New Mexico: Harding County (635 people) vs Pennsylvania: Cameron County (4,348 people). Cameron County's population is 6.8 times (585%) larger than Harding County's.
Richest county: New Mexico: Los Alamos County ($98,378 per capita income) vs Pennsylvania: Chester County ($110,883). Chester County's income is 1.1 times (13%) richer than Los Alamos County's.
Poorest county: New Mexico: Cibola County ($36,397 per capita income) vs Pennsylvania: Forest County ($30,234). Cibola County's income is 1.2 times (20%) richer than Forest County's.
New Mexico vs Pennsylvania Taxes
State income tax: New Mexico has a top income tax rate of 5.9%, while Pennsylvania has a top income tax rate of 3.07%. New Mexico's top rate is 2.83 percentage points higher.
Property tax: New Mexico: 0.63% effective rate vs Pennsylvania: 1.16% of home value per year. Pennsylvania's rate is 0.53 percentage points higher.
Sales tax: New Mexico: 7.68% combined state and average local rate vs Pennsylvania: 6.34%. New Mexico's combined rate is 1.34 percentage points higher.
Official Websites
New Mexico official website · Pennsylvania official website
More Size Comparisons
All New Mexico 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.