The map above shows Illinois and Puerto Rico side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Illinois vs Puerto Rico Geography
Land area: Illinois has a land area of 55,513 square miles (143,778 km²), while Puerto Rico has 3,424 square miles (8,868 km²). Illinois' land area is 16.2 times larger than Puerto Rico's.
Total area: Illinois: 57,913 square miles (149,995 km²) vs Puerto Rico: 3,515 square miles (9,104 km²), including inland and coastal water. Illinois' total area is 16.5 times larger than Puerto Rico's.
Length: Illinois is 390 miles (628 km) long from north to south; Puerto Rico is 67 miles (107 km). Illinois' north-south length is 5.8 times (482%) longer than Puerto Rico's.
Width: Illinois spans 283 miles (456 km) east to west; Puerto Rico spans 174 miles (279 km). Illinois' east-west width is 1.6 times (63%) wider than Puerto Rico's.
Highest point: Illinois's highest point is Charles Mound at 1,232 feet (376 m); Puerto Rico's is Cerro de Punta at 4,390 feet (1,338 m). Cerro de Punta is 3,158 feet higher than Charles Mound.
Lowest point: Illinois's lowest point is Mississippi River at 292 feet; Puerto Rico's is Atlantic Ocean at 0 feet. Puerto Rico's lowest point is 292 feet lower.
Illinois vs Puerto Rico Population and History
Population: Illinois has a population of 12,710,158 (2024), while Puerto Rico has 3,285,874 (2020). Illinois' population is 3.9 times (287%) larger than Puerto Rico's.
Population density: Illinois: 229.0 people per square mile vs Puerto Rico: 959.7. Puerto Rico's population density is 4.2 times (319%) higher than Illinois'.
Biggest city: Illinois's biggest city is Chicago with 2,721,308 people; Puerto Rico's is San Juan with 342,259. Chicago's population is 8.0 times (695%) larger than San Juan's.
Largest metro area: Illinois's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs Puerto Rico's San Juan metro area (2,233,177). Chicago-Naperville-Elgin, IL-IN metro area's population is 4.2 times (321%) larger than San Juan metro area's.
History: Illinois: Admitted to the Union on December 3, 1818, as the 21st state. Puerto Rico: A US territory since 1898; a commonwealth since 1952. In its current form, Illinois is the older of the two by 80 years.
Illinois vs Puerto Rico Economy
GDP: Illinois's GDP is $1,148.1 billion (2024) vs Puerto Rico's $129.0 billion. Illinois' economic output is 8.9 times (790%) larger than Puerto Rico's.
GDP per capita: Illinois: $90,330 per person vs Puerto Rico: $40,650. Illinois' GDP per capita is 2.2 times (122%) higher than Puerto Rico's.
Official Websites
Illinois official website · Puerto Rico official website
More Size Comparisons
All Illinois size comparisons · All Puerto Rico 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.