The map above shows Illinois and Utah side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Illinois vs Utah Geography
Land area
- Illinois has a land area of 55,513 square miles (143,778 km²), while Utah has 82,596 square miles (213,922 km²).
- Utah's land area is 1.5 times (49%) larger than Illinois'.
Total area
- Illinois: 57,913 square miles (149,995 km²) vs Utah: 84,898 square miles (219,885 km²), including inland and coastal water.
- Utah's total area is 1.5 times (47%) larger than Illinois'.
Length
- Illinois is 390 miles (628 km) long from north to south; Utah is 436 miles (702 km).
- Utah's north-south length is 1.1 times (12%) longer than Illinois'.
Width
- Illinois spans 283 miles (456 km) east to west; Utah spans 268 miles (431 km).
- Illinois' east-west width is 1.1 times (6%) wider than Utah's.
Highest point
- Illinois's highest point is Charles Mound at 1,232 feet (376 m); Utah's is Kings Peak at 13,512 feet (4,118 m).
- Kings Peak is 12,280 feet higher than Charles Mound.
Lowest point
- Illinois's lowest point is Mississippi River at 292 feet; Utah's is Beaver Dam Wash at 2,180 feet.
- Illinois's lowest point is 1,888 feet lower.
Illinois vs Utah Population and History
Population
- Illinois has a population of 12,710,158 (2024), while Utah has 3,503,613 (2024).
- Illinois' population is 3.6 times (263%) larger than Utah's.
Population density
- Illinois: 229.0 people per square mile vs Utah: 42.4.
- Illinois' population density is 5.4 times (440%) higher than Utah's.
Biggest city
- Illinois's biggest city is Chicago with 2,721,308 people; Utah's is Salt Lake City with 217,783.
- Chicago's population is 12.5 times larger than Salt Lake City's.
Largest metro area
- Illinois's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs Utah's Salt Lake City-Murray, UT metro area (1,300,762).
- Chicago-Naperville-Elgin, IL-IN metro area's population is 7.2 times (623%) larger than Salt Lake City-Murray, UT metro area's.
History
- Illinois: Admitted to the Union on December 3, 1818, as the 21st state.
- Utah: Admitted to the Union on January 4, 1896, as the 45th state.
- In its current form, Illinois is the older of the two by 78 years.
Illinois vs Utah Economy
GDP
- Illinois's GDP is $1,148.1 billion (2024) vs Utah's $299.5 billion.
- Illinois' economic output is 3.8 times (283%) larger than Utah's.
GDP per capita
- Illinois: $90,330 per person vs Utah: $85,475.
- Illinois' GDP per capita is 1.1 times (6%) higher than Utah's.
Average income
- Illinois: $74,522 vs Utah: $67,333 average income per person (per capita personal income).
- Illinois' average income is 1.1 times (11%) higher than Utah's.
Illinois vs Utah Counties
Number of counties
- Illinois has 102 counties, while Utah has 29.
- Illinois' county count is 3.5 times (252%) higher than Utah's.
Biggest county by area
- Illinois's largest county is McLean County at 1,183 square miles; Utah's is San Juan County at 7,824 square miles.
- San Juan County's land area is 6.6 times (561%) larger than McLean County's.
Smallest county by area
- Illinois: Putnam County (160 sq mi) vs Utah: Davis County (325 sq mi).
- Davis County's land area is 2.0 times (103%) larger than Putnam County's.
Most populous county
- Illinois: Cook County (5,182,617 people) vs Utah: Salt Lake County (1,216,274 people).
- Cook County's population is 4.3 times (326%) larger than Salt Lake County's.
Least populous county
- Illinois: Hardin County (3,550 people) vs Utah: Daggett County (956 people).
- Hardin County's population is 3.7 times (271%) larger than Daggett County's.
Richest county
- Illinois: Cumberland County ($104,890 per capita income) vs Utah: Summit County ($280,510).
- Summit County's income is 2.7 times (167%) richer than Cumberland County's.
Poorest county
- Illinois: Lawrence County ($43,606 per capita income) vs Utah: Beaver County ($39,179).
- Lawrence County's income is 1.1 times (11%) richer than Beaver County's.
Illinois vs Utah Taxes
State income tax
- Illinois has a top income tax rate of 4.95%, while Utah has a top income tax rate of 4.5%.
- Illinois's top rate is 0.45 percentage points higher.
Property tax
- Illinois: 1.92% effective rate vs Utah: 0.49% of home value per year.
- Illinois's rate is 1.43 percentage points higher.
Sales tax
- Illinois: 8.98% combined state and average local rate vs Utah: 7.42%.
- Illinois's combined rate is 1.56 percentage points higher.
Official Websites
Illinois official website · Utah official website
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More Size Comparisons
All Illinois size comparisons · All Utah 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.