The map above shows Montana and New Mexico side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Montana vs New Mexico Geography
Land area
- Montana has a land area of 145,550 square miles (376,973 km²), while New Mexico has 121,313 square miles (314,198 km²).
- Montana's land area is 1.2 times (20%) larger than New Mexico's.
Total area
- Montana: 147,043 square miles (380,840 km²) vs New Mexico: 121,593 square miles (314,925 km²), including inland and coastal water.
- Montana's total area is 1.2 times (21%) larger than New Mexico's.
Length
- Montana is 319 miles (514 km) long from north to south; New Mexico is 395 miles (635 km).
- New Mexico's north-south length is 1.2 times (24%) longer than Montana's.
Width
- Montana spans 607 miles (976 km) east to west; New Mexico spans 498 miles (801 km).
- Montana's east-west width is 1.2 times (22%) wider than New Mexico's.
Highest point
- Montana's highest point is Granite Peak at 12,767 feet (3,891 m); New Mexico's is Wheeler Peak at 13,150 feet (4,008 m).
- Wheeler Peak is 383 feet higher than Granite Peak.
Lowest point
- Montana's lowest point is Kootenai River at 1,805 feet; New Mexico's is Red Bluff Reservoir at 2,842 feet.
- Montana's lowest point is 1,037 feet lower.
Montana vs New Mexico Population and History
Population
- Montana has a population of 1,137,233 (2024), while New Mexico has 2,130,256 (2024).
- New Mexico's population is 1.9 times (87%) larger than Montana's.
Population density
- Montana: 7.8 people per square mile vs New Mexico: 17.6.
- New Mexico's population density is 2.3 times (126%) higher than Montana's.
Biggest city
- Montana's biggest city is Billings with 121,483 people; New Mexico's is Albuquerque with 560,326.
- Albuquerque's population is 4.6 times (361%) larger than Billings'.
Largest metro area
- Montana's largest metropolitan area is Billings, MT metro area (192,531 people) vs New Mexico's Albuquerque, NM metro area (926,303).
- Albuquerque, NM metro area's population is 4.8 times (381%) larger than Billings, MT metro area's.
History
- Montana: Admitted to the Union on November 8, 1889, as the 41st state.
- New Mexico: Admitted to the Union on January 6, 1912, as the 47th state.
- In its current form, Montana is the older of the two by 23 years.
Montana vs New Mexico Economy
GDP
- Montana's GDP is $78.4 billion (2024) vs New Mexico's $147.1 billion.
- New Mexico's economic output is 1.9 times (88%) larger than Montana's.
GDP per capita
- Montana: $68,975 per person vs New Mexico: $69,046.
- Montana and New Mexico have about the same GDP per capita.
Average income
- Montana: $69,240 vs New Mexico: $58,249 average income per person (per capita personal income).
- Montana's average income is 1.2 times (19%) higher than New Mexico's.
Montana vs New Mexico Counties
Number of counties
- Montana has 56 counties, while New Mexico has 33.
- Montana's county count is 1.7 times (70%) higher than New Mexico's.
Biggest county by area
- Montana's largest county is Beaverhead County at 5,543 square miles; New Mexico's is Catron County at 6,924 square miles.
- Catron County's land area is 1.2 times (25%) larger than Beaverhead County's.
Smallest county by area
- Montana: Silver Bow County (718 sq mi) vs New Mexico: Los Alamos County (109 sq mi).
- Silver Bow County's land area is 6.6 times (558%) larger than Los Alamos County's.
Most populous county
- Montana: Yellowstone County (171,583 people) vs New Mexico: Bernalillo County (671,747 people).
- Bernalillo County's population is 3.9 times (291%) larger than Yellowstone County's.
Least populous county
- Montana: Petroleum County (525 people) vs New Mexico: Harding County (635 people).
- Harding County's population is 1.2 times (21%) larger than Petroleum County's.
Richest county
- Montana: Gallatin County ($94,573 per capita income) vs New Mexico: Los Alamos County ($98,378).
- Gallatin County and Los Alamos County have about the same income.
Poorest county
- Montana: Blaine County ($37,554 per capita income) vs New Mexico: Cibola County ($36,397).
- Blaine County and Cibola County have about the same income.
Montana vs New Mexico Taxes
State income tax
- Montana has a top income tax rate of 5.65%, while New Mexico has a top income tax rate of 5.9%.
- New Mexico's top rate is 0.25 percentage points higher.
Property tax
- Montana: 0.69% effective rate vs New Mexico: 0.63% of home value per year.
- Montana's rate is 0.06 percentage points higher.
Sales tax
- Montana: 0% combined state and average local rate vs New Mexico: 7.68%.
- New Mexico's combined rate is 7.68 percentage points higher.
Official Websites
Montana official website · New Mexico official website
Download the Montana vs New Mexico Size Comparison Map for free
To download the map, right-click the image above (or press and hold on a phone or tablet) and choose Save image as. The map is free to use anywhere, including on your own website or in print, as long as you credit it with a link back to this page or to BrilliantMaps.com.
More Size Comparisons
All Montana 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.