The map above shows Illinois and Oregon side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Illinois vs Oregon Geography
Land area
- Illinois has a land area of 55,513 square miles (143,778 km²), while Oregon has 95,997 square miles (248,630 km²).
- Oregon's land area is 1.7 times (73%) larger than Illinois'.
Total area
- Illinois: 57,913 square miles (149,995 km²) vs Oregon: 98,379 square miles (254,799 km²), including inland and coastal water.
- Oregon's total area is 1.7 times (70%) larger than Illinois'.
Length
- Illinois is 390 miles (628 km) long from north to south; Oregon is 453 miles (730 km).
- Oregon's north-south length is 1.2 times (16%) longer than Illinois'.
Width
- Illinois spans 283 miles (456 km) east to west; Oregon spans 445 miles (715 km).
- Oregon's east-west width is 1.6 times (57%) wider than Illinois'.
Highest point
- Illinois's highest point is Charles Mound at 1,232 feet (376 m); Oregon's is Mount Hood at 11,232 feet (3,424 m).
- Mount Hood is 10,000 feet higher than Charles Mound.
Lowest point
- Illinois's lowest point is Mississippi River at 292 feet; Oregon's is Pacific Ocean at 0 feet.
- Oregon's lowest point is 292 feet lower.
Illinois vs Oregon Population and History
Population
- Illinois has a population of 12,710,158 (2024), while Oregon has 4,272,371 (2024).
- Illinois' population is 3.0 times (197%) larger than Oregon's.
Population density
- Illinois: 229.0 people per square mile vs Oregon: 44.5.
- Illinois' population density is 5.1 times (415%) higher than Oregon's.
Biggest city
- Illinois's biggest city is Chicago with 2,721,308 people; Oregon's is Portland with 635,749.
- Chicago's population is 4.3 times (328%) larger than Portland's.
Largest metro area
- Illinois's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs Oregon's Portland-Vancouver-Hillsboro, OR-WA metro area (2,537,904).
- Chicago-Naperville-Elgin, IL-IN metro area's population is 3.7 times (271%) larger than Portland-Vancouver-Hillsboro, OR-WA metro area's.
History
- Illinois: Admitted to the Union on December 3, 1818, as the 21st state.
- Oregon: Admitted to the Union on February 14, 1859, as the 33rd state.
- In its current form, Illinois is the older of the two by 41 years.
Illinois vs Oregon Economy
GDP
- Illinois's GDP is $1,148.1 billion (2024) vs Oregon's $330.2 billion.
- Illinois' economic output is 3.5 times (248%) larger than Oregon's.
GDP per capita
- Illinois: $90,330 per person vs Oregon: $77,299.
- Illinois' GDP per capita is 1.2 times (17%) higher than Oregon's.
Average income
- Illinois: $74,522 vs Oregon: $70,823 average income per person (per capita personal income).
- Illinois' average income is 1.1 times (5%) higher than Oregon's.
Illinois vs Oregon Counties
Number of counties
- Illinois has 102 counties, while Oregon has 36.
- Illinois' county count is 2.8 times (183%) higher than Oregon's.
Biggest county by area
- Illinois's largest county is McLean County at 1,183 square miles; Oregon's is Harney County at 10,134 square miles.
- Harney County's land area is 8.6 times (757%) larger than McLean County's.
Smallest county by area
- Illinois: Putnam County (160 sq mi) vs Oregon: Multnomah County (431 sq mi).
- Multnomah County's land area is 2.7 times (169%) larger than Putnam County's.
Most populous county
- Illinois: Cook County (5,182,617 people) vs Oregon: Multnomah County (795,897 people).
- Cook County's population is 6.5 times (551%) larger than Multnomah County's.
Least populous county
- Illinois: Hardin County (3,550 people) vs Oregon: Wheeler County (1,456 people).
- Hardin County's population is 2.4 times (144%) larger than Wheeler County's.
Richest county
- Illinois: Cumberland County ($104,890 per capita income) vs Oregon: Deschutes County ($86,176).
- Cumberland County's income is 1.2 times (22%) richer than Deschutes County's.
Poorest county
- Illinois: Lawrence County ($43,606 per capita income) vs Oregon: Malheur County ($42,974).
- Lawrence County and Malheur County have about the same income.
Illinois vs Oregon Taxes
State income tax
- Illinois has a top income tax rate of 4.95%, while Oregon has a top income tax rate of 9.9%.
- Oregon's top rate is 4.95 percentage points higher.
Property tax
- Illinois: 1.92% effective rate vs Oregon: 0.78% of home value per year.
- Illinois's rate is 1.14 percentage points higher.
Sales tax
- Illinois: 8.98% combined state and average local rate vs Oregon: 0%.
- Illinois's combined rate is 8.98 percentage points higher.
Official Websites
Illinois official website · Oregon official website
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More Size Comparisons
All Illinois size comparisons · All Oregon 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.