The map above shows Illinois and Japan side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Illinois vs Japan Geography
Land area
- Illinois has a land area of 55,513 square miles (143,778 km²), while Japan has 140,752 square miles (364,546 km²).
- Japan's land area is 2.5 times (154%) larger than Illinois'.
Total area
- Illinois: 57,913 square miles (149,995 km²) vs Japan: 145,937 square miles (377,975 km²), including inland and coastal water.
- Japan's total area is 2.5 times (152%) larger than Illinois'.
Length
- Illinois is 390 miles (628 km) long from north to south; Japan is 1,557 miles (2,505 km).
- Japan's north-south length is 4.0 times (299%) longer than Illinois'.
Width
- Illinois spans 283 miles (456 km) east to west; Japan spans 1,568 miles (2,524 km).
- Japan's east-west width is 5.5 times (454%) wider than Illinois'.
Highest point
- Illinois's highest point is Charles Mound at 1,232 feet (376 m); Japan's is Mount Fuji at 12,388 feet (3,776 m).
- Mount Fuji is 11,156 feet higher than Charles Mound.
Lowest point
- Illinois's lowest point is Mississippi River at 292 feet; Japan's is Hachirogata at -13 feet.
- Japan's lowest point is 305 feet lower.
Illinois vs Japan Population and History
Population
- Illinois has a population of 12,710,158 (2024), while Japan has 122,680,000 (2026).
- Japan's population is 9.7 times (865%) larger than Illinois'.
Population density
- Illinois: 229.0 people per square mile vs Japan: 871.6.
- Japan's population density is 3.8 times (281%) higher than Illinois'.
Biggest city
- Illinois's biggest city is Chicago with 2,721,308 people; Japan's is Tokyo with 13,515,271.
- Tokyo's population is 5.0 times (397%) 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 Japan's Tokyo (33,412,512).
- Tokyo's population is 3.6 times (255%) larger than Chicago-Naperville-Elgin, IL-IN metro area's.
History
- Illinois: Admitted to the Union on December 3, 1818, as the 21st state.
- Japan: An independent state for over two millennia; the current constitution dates from 1947.
- In its current form, Japan is the older of the two by 1,158 years.
Illinois vs Japan Economy
GDP
- Illinois's GDP is $1,148.1 billion (2024) vs Japan's $4,435.2 billion.
- Japan's economic output is 3.9 times (286%) larger than Illinois'.
GDP per capita
- Illinois: $90,330 per person vs Japan: $35,951.
- Illinois' GDP per capita is 2.5 times (151%) higher than Japan's.
Average income
- Illinois: $74,522 vs Japan: $38,340 average income per person (per capita personal income).
- Illinois' average income is 1.9 times (94%) higher than Japan's.
Official Websites
Illinois official website · Japan official website
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More Size Comparisons
All Illinois size comparisons · All Japan 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.