The map above shows Florida and Illinois side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Florida vs Illinois Geography
Land area: Florida has a land area of 53,655 square miles (138,965 km²), while Illinois has 55,513 square miles (143,778 km²). Florida and Illinois have about the same land area.
Total area: Florida: 71,404 square miles (184,934 km²) vs Illinois: 57,913 square miles (149,995 km²), including inland and coastal water. Florida's total area is 1.2 times (23%) larger than Illinois'.
Length: Florida is 471 miles (758 km) long from north to south; Illinois is 390 miles (628 km). Florida's north-south length is 1.2 times (21%) longer than Illinois'.
Width: Florida spans 547 miles (880 km) east to west; Illinois spans 283 miles (456 km). Florida's east-west width is 1.9 times (93%) wider than Illinois'.
Highest point: Florida's highest point is Britton Hill at 344 feet (105 m); Illinois's is Charles Mound at 1,232 feet (376 m). Charles Mound is 888 feet higher than Britton Hill.
Lowest point: Florida's lowest point is Atlantic Ocean at 0 feet; Illinois's is Mississippi River at 292 feet. Florida's lowest point is 292 feet lower.
Florida vs Illinois Population and History
Population: Florida has a population of 23,372,215 (2024), while Illinois has 12,710,158 (2024). Florida's population is 1.8 times (84%) larger than Illinois'.
Population density: Florida: 435.6 people per square mile vs Illinois: 229.0. Florida's population density is 1.9 times (90%) higher than Illinois'.
Biggest city: Florida's biggest city is Jacksonville with 1,009,833 people; Illinois's is Chicago with 2,721,308. Chicago's population is 2.7 times (169%) larger than Jacksonville's.
Largest metro area: Florida's largest metropolitan area is Miami-Fort Lauderdale-West Palm Beach, FL metro area (6,457,988 people) vs Illinois's Chicago-Naperville-Elgin, IL-IN metro area (9,408,576). Chicago-Naperville-Elgin, IL-IN metro area's population is 1.5 times (46%) larger than Miami-Fort Lauderdale-West Palm Beach, FL metro area's.
History: Florida: Admitted to the Union on March 3, 1845, as the 27th state. Illinois: Admitted to the Union on December 3, 1818, as the 21st state. In its current form, Illinois is the older of the two by 27 years.
Florida vs Illinois Economy
GDP: Florida's GDP is $1,726.7 billion (2024) vs Illinois's $1,148.1 billion. Florida's economic output is 1.5 times (50%) larger than Illinois'.
GDP per capita: Florida: $73,879 per person vs Illinois: $90,330. Illinois' GDP per capita is 1.2 times (22%) higher than Florida's.
Average income: Florida: $73,006 vs Illinois: $74,522 average income per person (per capita personal income). Florida and Illinois have about the same average income.
Florida vs Illinois Counties
Number of counties: Florida has 67 counties, while Illinois has 102. Illinois' county count is 1.5 times (52%) higher than Florida's.
Biggest county by area: Florida's largest county is Collier County at 1,997 square miles; Illinois's is McLean County at 1,183 square miles. Collier County's land area is 1.7 times (69%) larger than McLean County's.
Smallest county by area: Florida: Union County (244 sq mi) vs Illinois: Putnam County (160 sq mi). Union County's land area is 1.5 times (52%) larger than Putnam County's.
Most populous county: Florida: Miami-Dade County (2,838,461 people) vs Illinois: Cook County (5,182,617 people). Cook County's population is 1.8 times (83%) larger than Miami-Dade County's.
Least populous county: Florida: Liberty County (7,955 people) vs Illinois: Hardin County (3,550 people). Liberty County's population is 2.2 times (124%) larger than Hardin County's.
Richest county: Florida: Collier County ($150,140 per capita income) vs Illinois: Cumberland County ($104,890). Collier County's income is 1.4 times (43%) richer than Cumberland County's.
Poorest county: Florida: Union County ($30,156 per capita income) vs Illinois: Lawrence County ($43,606). Lawrence County's income is 1.4 times (45%) richer than Union County's.
Florida vs Illinois Taxes
State income tax: Florida has no state income tax, while Illinois has a top income tax rate of 4.95%. Illinois's top rate is 4.95 percentage points higher.
Property tax: Florida: 0.75% effective rate vs Illinois: 1.92% of home value per year. Illinois's rate is 1.17 percentage points higher.
Sales tax: Florida: 6.98% combined state and average local rate vs Illinois: 8.98%. Illinois's combined rate is 2 percentage points higher.
Official Websites
Florida official website · Illinois official website
More Size Comparisons
All Florida size comparisons · All Illinois 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.