The map above shows Illinois and Spain side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Illinois vs Spain Geography
Land area: Illinois has a land area of 55,513 square miles (143,778 km²), while Spain has 192,657 square miles (498,980 km²). Spain's land area is 3.5 times (247%) larger than Illinois'.
Total area: Illinois: 57,913 square miles (149,995 km²) vs Spain: 195,364 square miles (505,990 km²), including inland and coastal water. Spain's total area is 3.4 times (237%) larger than Illinois'.
Length: Illinois is 390 miles (628 km) long from north to south; Spain is 546 miles (879 km). Spain's north-south length is 1.4 times (40%) longer than Illinois'.
Width: Illinois spans 283 miles (456 km) east to west; Spain spans 697 miles (1,122 km). Spain's east-west width is 2.5 times (146%) wider than Illinois'.
Highest point: Illinois's highest point is Charles Mound at 1,232 feet (376 m); Spain's is Teide (Tenerife) at 12,188 feet (3,715 m). Teide (Tenerife) is 10,956 feet higher than Charles Mound.
Lowest point: Illinois's lowest point is Mississippi River at 292 feet; Spain's is Atlantic Ocean at 0 feet. Spain's lowest point is 292 feet lower.
Illinois vs Spain Population and History
Population: Illinois has a population of 12,710,158 (2024), while Spain has 49,801,559 (2026). Spain's population is 3.9 times (292%) larger than Illinois'.
Population density: Illinois: 229.0 people per square mile vs Spain: 258.5. Spain's population density is 1.1 times (13%) higher than Illinois'.
Biggest city: Illinois's biggest city is Chicago with 2,721,308 people; Spain's is Madrid with 3,266,126. Madrid's population is 1.2 times (20%) larger than Chicago's.
Largest metro area: Illinois's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs Spain's Madrid (6,497,000). Chicago-Naperville-Elgin, IL-IN metro area's population is 1.4 times (45%) larger than Madrid's.
History: Illinois: Admitted to the Union on December 3, 1818, as the 21st state. Spain: A unified kingdom since 1479; the current constitution dates from 1978. In its current form, Spain is the older of the two by 339 years.
Illinois vs Spain Economy
GDP: Illinois's GDP is $1,148.1 billion (2024) vs Spain's $1,906.5 billion. Spain's economic output is 1.7 times (66%) larger than Illinois'.
GDP per capita: Illinois: $90,330 per person vs Spain: $38,627. Illinois' GDP per capita is 2.3 times (134%) higher than Spain's.
Average income: Illinois: $74,522 vs Spain: $37,120 average income per person (per capita personal income). Illinois' average income is 2.0 times (101%) higher than Spain's.
Official Websites
Illinois official website · Spain official website
More Size Comparisons
All Illinois size comparisons · All Spain 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.