The map above shows Illinois and New Mexico side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Illinois vs New Mexico Geography
Land area
- Illinois has a land area of 55,513 square miles (143,778 km²), while New Mexico has 121,313 square miles (314,198 km²).
- New Mexico's land area is 2.2 times (119%) larger than Illinois'.
Total area
- Illinois: 57,913 square miles (149,995 km²) vs New Mexico: 121,593 square miles (314,925 km²), including inland and coastal water.
- New Mexico's total area is 2.1 times (110%) larger than Illinois'.
Length
- Illinois is 390 miles (628 km) long from north to south; New Mexico is 395 miles (635 km).
- Illinois and New Mexico have about the same north-south length.
Width
- Illinois spans 283 miles (456 km) east to west; New Mexico spans 498 miles (801 km).
- New Mexico's east-west width is 1.8 times (76%) wider than Illinois'.
Highest point
- Illinois's highest point is Charles Mound at 1,232 feet (376 m); New Mexico's is Wheeler Peak at 13,150 feet (4,008 m).
- Wheeler Peak is 11,918 feet higher than Charles Mound.
Lowest point
- Illinois's lowest point is Mississippi River at 292 feet; New Mexico's is Red Bluff Reservoir at 2,842 feet.
- Illinois's lowest point is 2,550 feet lower.
Illinois vs New Mexico Population and History
Population
- Illinois has a population of 12,710,158 (2024), while New Mexico has 2,130,256 (2024).
- Illinois' population is 6.0 times (497%) larger than New Mexico's.
Population density
- Illinois: 229.0 people per square mile vs New Mexico: 17.6.
- Illinois' population density is 13.0 times higher than New Mexico's.
Biggest city
- Illinois's biggest city is Chicago with 2,721,308 people; New Mexico's is Albuquerque with 560,326.
- Chicago's population is 4.9 times (386%) larger than Albuquerque's.
Largest metro area
- Illinois's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs New Mexico's Albuquerque, NM metro area (926,303).
- Chicago-Naperville-Elgin, IL-IN metro area's population is 10.2 times larger than Albuquerque, NM metro area's.
History
- Illinois: Admitted to the Union on December 3, 1818, as the 21st state.
- New Mexico: Admitted to the Union on January 6, 1912, as the 47th state.
- In its current form, Illinois is the older of the two by 94 years.
Illinois vs New Mexico Economy
GDP
- Illinois's GDP is $1,148.1 billion (2024) vs New Mexico's $147.1 billion.
- Illinois' economic output is 7.8 times (680%) larger than New Mexico's.
GDP per capita
- Illinois: $90,330 per person vs New Mexico: $69,046.
- Illinois' GDP per capita is 1.3 times (31%) higher than New Mexico's.
Average income
- Illinois: $74,522 vs New Mexico: $58,249 average income per person (per capita personal income).
- Illinois' average income is 1.3 times (28%) higher than New Mexico's.
Illinois vs New Mexico Counties
Number of counties
- Illinois has 102 counties, while New Mexico has 33.
- Illinois' county count is 3.1 times (209%) higher than New Mexico's.
Biggest county by area
- Illinois's largest county is McLean County at 1,183 square miles; New Mexico's is Catron County at 6,924 square miles.
- Catron County's land area is 5.9 times (485%) larger than McLean County's.
Smallest county by area
- Illinois: Putnam County (160 sq mi) vs New Mexico: Los Alamos County (109 sq mi).
- Putnam County's land area is 1.5 times (47%) larger than Los Alamos County's.
Most populous county
- Illinois: Cook County (5,182,617 people) vs New Mexico: Bernalillo County (671,747 people).
- Cook County's population is 7.7 times (672%) larger than Bernalillo County's.
Least populous county
- Illinois: Hardin County (3,550 people) vs New Mexico: Harding County (635 people).
- Hardin County's population is 5.6 times (459%) larger than Harding County's.
Richest county
- Illinois: Cumberland County ($104,890 per capita income) vs New Mexico: Los Alamos County ($98,378).
- Cumberland County's income is 1.1 times (7%) richer than Los Alamos County's.
Poorest county
- Illinois: Lawrence County ($43,606 per capita income) vs New Mexico: Cibola County ($36,397).
- Lawrence County's income is 1.2 times (20%) richer than Cibola County's.
Illinois vs New Mexico Taxes
State income tax
- Illinois has a top income tax rate of 4.95%, while New Mexico has a top income tax rate of 5.9%.
- New Mexico's top rate is 0.95 percentage points higher.
Property tax
- Illinois: 1.92% effective rate vs New Mexico: 0.63% of home value per year.
- Illinois's rate is 1.29 percentage points higher.
Sales tax
- Illinois: 8.98% combined state and average local rate vs New Mexico: 7.68%.
- Illinois's combined rate is 1.3 percentage points higher.
Official Websites
Illinois official website · New Mexico official website
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More Size Comparisons
All Illinois size comparisons · All New Mexico 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.