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Illinois vs Iowa Size Comparison Map

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ILLINOIS VS IOWAOverlaid at the same scaleIllinois57,913 sq mi (149,995 km²)Iowa56,273 sq mi (145,746 km²)Illinois and Iowa are about the same size. brilliantmaps.com

The map above shows Illinois and Iowa side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.

Illinois vs Iowa Geography

Land area

  • Illinois has a land area of 55,513 square miles (143,778 km²), while Iowa has 55,854 square miles (144,660 km²).
  • Illinois and Iowa have about the same land area.

Total area

  • Illinois: 57,913 square miles (149,995 km²) vs Iowa: 56,273 square miles (145,746 km²), including inland and coastal water.
  • Illinois and Iowa have about the same total area.

Length

  • Illinois is 390 miles (628 km) long from north to south; Iowa is 216 miles (347 km).
  • Illinois' north-south length is 1.8 times (81%) longer than Iowa's.

Width

  • Illinois spans 283 miles (456 km) east to west; Iowa spans 335 miles (539 km).
  • Iowa's east-west width is 1.2 times (18%) wider than Illinois'.

Highest point

  • Illinois's highest point is Charles Mound at 1,232 feet (376 m); Iowa's is Hawkeye Point at 1,669 feet (509 m).
  • Hawkeye Point is 437 feet higher than Charles Mound.

Lowest point

  • Illinois's lowest point is Mississippi River at 292 feet; Iowa's is Mississippi River at 480 feet.
  • Illinois's lowest point is 188 feet lower.

Illinois vs Iowa Population and History

Population

  • Illinois has a population of 12,710,158 (2024), while Iowa has 3,241,488 (2024).
  • Illinois' population is 3.9 times (292%) larger than Iowa's.

Population density

  • Illinois: 229.0 people per square mile vs Iowa: 58.0.
  • Illinois' population density is 3.9 times (295%) higher than Iowa's.

Biggest city

  • Illinois's biggest city is Chicago with 2,721,308 people; Iowa's is Des Moines with 213,096.
  • Chicago's population is 12.8 times larger than Des Moines'.

Largest metro area

  • Illinois's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs Iowa's Omaha, NE-IA metro area (1,001,010).
  • Chicago-Naperville-Elgin, IL-IN metro area's population is 9.4 times (840%) larger than Omaha, NE-IA metro area's.

History

  • Illinois: Admitted to the Union on December 3, 1818, as the 21st state.
  • Iowa: Admitted to the Union on December 28, 1846, as the 29th state.
  • In its current form, Illinois is the older of the two by 28 years.

Illinois vs Iowa Economy

GDP

  • Illinois's GDP is $1,148.1 billion (2024) vs Iowa's $265.8 billion.
  • Illinois' economic output is 4.3 times (332%) larger than Iowa's.

GDP per capita

  • Illinois: $90,330 per person vs Iowa: $81,998.
  • Illinois' GDP per capita is 1.1 times (10%) higher than Iowa's.

Average income

  • Illinois: $74,522 vs Iowa: $65,225 average income per person (per capita personal income).
  • Illinois' average income is 1.1 times (14%) higher than Iowa's.

Illinois vs Iowa Counties

Number of counties

  • Illinois has 102 counties, while Iowa has 99.
  • Illinois and Iowa have about the same county count.

Biggest county by area

  • Illinois's largest county is McLean County at 1,183 square miles; Iowa's is Kossuth County at 973 square miles.
  • McLean County's land area is 1.2 times (22%) larger than Kossuth County's.

Smallest county by area

  • Illinois: Putnam County (160 sq mi) vs Iowa: Dickinson County (381 sq mi).
  • Dickinson County's land area is 2.4 times (138%) larger than Putnam County's.

Most populous county

  • Illinois: Cook County (5,182,617 people) vs Iowa: Polk County (516,185 people).
  • Cook County's population is 10.0 times larger than Polk County's.

Least populous county

  • Illinois: Hardin County (3,550 people) vs Iowa: Adams County (3,606 people).
  • Hardin County and Adams County have about the same population.

Richest county

  • Illinois: Cumberland County ($104,890 per capita income) vs Iowa: Mitchell County ($98,211).
  • Cumberland County's income is 1.1 times (7%) richer than Mitchell County's.

Poorest county

  • Illinois: Lawrence County ($43,606 per capita income) vs Iowa: Decatur County ($46,134).
  • Decatur County's income is 1.1 times (6%) richer than Lawrence County's.

Illinois vs Iowa Taxes

State income tax

  • Illinois has a top income tax rate of 4.95%, while Iowa has a top income tax rate of 3.8%.
  • Illinois's top rate is 1.15 percentage points higher.

Property tax

  • Illinois: 1.92% effective rate vs Iowa: 1.29% of home value per year.
  • Illinois's rate is 0.63 percentage points higher.

Sales tax

  • Illinois: 8.98% combined state and average local rate vs Iowa: 6.94%.
  • Illinois's combined rate is 2.04 percentage points higher.

Official Websites

Illinois official website · Iowa official website

Download the Illinois vs Iowa Size Comparison Map for free

Illinois vs Iowa Size Comparison Map

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More Size Comparisons

All Illinois size comparisons · All Iowa 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.