The map above shows Illinois and New Hampshire side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Illinois vs New Hampshire Geography
Land area
- Illinois has a land area of 55,513 square miles (143,778 km²), while New Hampshire has 8,954 square miles (23,190 km²).
- Illinois' land area is 6.2 times (520%) larger than New Hampshire's.
Total area
- Illinois: 57,913 square miles (149,995 km²) vs New Hampshire: 9,350 square miles (24,216 km²), including inland and coastal water.
- Illinois' total area is 6.2 times (519%) larger than New Hampshire's.
Length
- Illinois is 390 miles (628 km) long from north to south; New Hampshire is 180 miles (290 km).
- Illinois' north-south length is 2.2 times (117%) longer than New Hampshire's.
Width
- Illinois spans 283 miles (456 km) east to west; New Hampshire spans 95 miles (152 km).
- Illinois' east-west width is 3.0 times (198%) wider than New Hampshire's.
Highest point
- Illinois's highest point is Charles Mound at 1,232 feet (376 m); New Hampshire's is Mount Washington at 6,277 feet (1,913 m).
- Mount Washington is 5,045 feet higher than Charles Mound.
Lowest point
- Illinois's lowest point is Mississippi River at 292 feet; New Hampshire's is Atlantic Ocean at 0 feet.
- New Hampshire's lowest point is 292 feet lower.
Illinois vs New Hampshire Population and History
Population
- Illinois has a population of 12,710,158 (2024), while New Hampshire has 1,409,032 (2024).
- Illinois' population is 9.0 times (802%) larger than New Hampshire's.
Population density
- Illinois: 229.0 people per square mile vs New Hampshire: 157.4.
- Illinois' population density is 1.5 times (45%) higher than New Hampshire's.
Biggest city
- Illinois's biggest city is Chicago with 2,721,308 people; New Hampshire's is Manchester with 116,386.
- Chicago's population is 23.4 times larger than Manchester's.
Largest metro area
- Illinois's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs New Hampshire's Boston-Cambridge-Newton, MA-NH metro area (5,025,517).
- Chicago-Naperville-Elgin, IL-IN metro area's population is 1.9 times (87%) larger than Boston-Cambridge-Newton, MA-NH metro area's.
History
- Illinois: Admitted to the Union on December 3, 1818, as the 21st state.
- New Hampshire: Admitted to the Union on June 21, 1788, as the 9th state.
- In its current form, New Hampshire is the older of the two by 30 years.
Illinois vs New Hampshire Economy
GDP
- Illinois's GDP is $1,148.1 billion (2024) vs New Hampshire's $119.3 billion.
- Illinois' economic output is 9.6 times (862%) larger than New Hampshire's.
GDP per capita
- Illinois: $90,330 per person vs New Hampshire: $84,694.
- Illinois' GDP per capita is 1.1 times (7%) higher than New Hampshire's.
Average income
- Illinois: $74,522 vs New Hampshire: $83,192 average income per person (per capita personal income).
- New Hampshire's average income is 1.1 times (12%) higher than Illinois'.
Illinois vs New Hampshire Counties
Number of counties
- Illinois has 102 counties, while New Hampshire has 10.
- Illinois' county count is 10.2 times higher than New Hampshire's.
Biggest county by area
- Illinois's largest county is McLean County at 1,183 square miles; New Hampshire's is Coos County at 1,795 square miles.
- Coos County's land area is 1.5 times (52%) larger than McLean County's.
Smallest county by area
- Illinois: Putnam County (160 sq mi) vs New Hampshire: Strafford County (368 sq mi).
- Strafford County's land area is 2.3 times (130%) larger than Putnam County's.
Most populous county
- Illinois: Cook County (5,182,617 people) vs New Hampshire: Hillsborough County (430,462 people).
- Cook County's population is 12.0 times larger than Hillsborough County's.
Least populous county
- Illinois: Hardin County (3,550 people) vs New Hampshire: Coos County (31,094 people).
- Coos County's population is 8.8 times (776%) larger than Hardin County's.
Richest county
- Illinois: Cumberland County ($104,890 per capita income) vs New Hampshire: Rockingham County ($100,216).
- Cumberland County and Rockingham County have about the same income.
Poorest county
- Illinois: Lawrence County ($43,606 per capita income) vs New Hampshire: Coos County ($60,657).
- Coos County's income is 1.4 times (39%) richer than Lawrence County's.
Illinois vs New Hampshire Taxes
State income tax
- Illinois has a top income tax rate of 4.95%, while New Hampshire has no state income tax.
- Illinois's top rate is 4.95 percentage points higher.
Property tax
- Illinois: 1.92% effective rate vs New Hampshire: 1.46% of home value per year.
- Illinois's rate is 0.46 percentage points higher.
Sales tax
- Illinois: 8.98% combined state and average local rate vs New Hampshire: 0%.
- Illinois's combined rate is 8.98 percentage points higher.
Official Websites
Illinois official website · New Hampshire official website
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More Size Comparisons
All Illinois size comparisons · All New Hampshire 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.