The map above shows Idaho and Massachusetts side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs Massachusetts Geography
Land area
- Idaho has a land area of 82,645 square miles (214,051 km²), while Massachusetts has 7,801 square miles (20,204 km²).
- Idaho's land area is 10.6 times larger than Massachusetts'.
Total area
- Idaho: 83,569 square miles (216,441 km²) vs Massachusetts: 10,554 square miles (27,335 km²), including inland and coastal water.
- Idaho's total area is 7.9 times (692%) larger than Massachusetts'.
Length
- Idaho is 483 miles (778 km) long from north to south; Massachusetts is 123 miles (198 km).
- Idaho's north-south length is 3.9 times (293%) longer than Massachusetts'.
Width
- Idaho spans 352 miles (566 km) east to west; Massachusetts spans 185 miles (297 km).
- Idaho's east-west width is 1.9 times (90%) wider than Massachusetts'.
Highest point
- Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); Massachusetts's is Mount Greylock at 3,489 feet (1,063 m).
- Borah Peak is 9,142 feet higher than Mount Greylock.
Lowest point
- Idaho's lowest point is Snake River at 718 feet; Massachusetts's is Atlantic Ocean at 0 feet.
- Massachusetts's lowest point is 718 feet lower.
Idaho vs Massachusetts Population and History
Population
- Idaho has a population of 2,001,619 (2024), while Massachusetts has 7,136,171 (2024).
- Massachusetts' population is 3.6 times (257%) larger than Idaho's.
Population density
- Idaho: 24.2 people per square mile vs Massachusetts: 914.8.
- Massachusetts' population density is 37.8 times higher than Idaho's.
Biggest city
- Idaho's biggest city is Boise with 237,963 people; Massachusetts's is Boston with 673,458.
- Boston's population is 2.8 times (183%) larger than Boise's.
Largest metro area
- Idaho's largest metropolitan area is Boise City, ID metro area (845,877 people) vs Massachusetts's Boston-Cambridge-Newton, MA-NH metro area (5,025,517).
- Boston-Cambridge-Newton, MA-NH metro area's population is 5.9 times (494%) larger than Boise City, ID metro area's.
History
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd state.
- Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state.
- In its current form, Massachusetts is the older of the two by 102 years.
Idaho vs Massachusetts Economy
GDP
- Idaho's GDP is $129.0 billion (2024) vs Massachusetts's $778.5 billion.
- Massachusetts' economic output is 6.0 times (503%) larger than Idaho's.
GDP per capita
- Idaho: $64,457 per person vs Massachusetts: $109,095.
- Massachusetts' GDP per capita is 1.7 times (69%) higher than Idaho's.
Average income
- Idaho: $62,323 vs Massachusetts: $93,607 average income per person (per capita personal income).
- Massachusetts' average income is 1.5 times (50%) higher than Idaho's.
Idaho vs Massachusetts Counties
Number of counties
- Idaho has 44 counties, while Massachusetts has 14.
- Idaho's county count is 3.1 times (214%) higher than Massachusetts'.
Biggest county by area
- Idaho's largest county is Idaho County at 8,478 square miles; Massachusetts's is Worcester County at 1,511 square miles.
- Idaho County's land area is 5.6 times (461%) larger than Worcester County's.
Smallest county by area
- Idaho: Payette County (407 sq mi) vs Massachusetts: Nantucket County (46 sq mi).
- Payette County's land area is 8.8 times (781%) larger than Nantucket County's.
Most populous county
- Idaho: Ada County (535,799 people) vs Massachusetts: Middlesex County (1,668,956 people).
- Middlesex County's population is 3.1 times (211%) larger than Ada County's.
Least populous county
- Idaho: Clark County (794 people) vs Massachusetts: Nantucket County (14,670 people).
- Nantucket County's population is 18.5 times larger than Clark County's.
Richest county
- Idaho: Blaine County ($202,612 per capita income) vs Massachusetts: Nantucket County ($129,250).
- Blaine County's income is 1.6 times (57%) richer than Nantucket County's.
Poorest county
- Idaho: Madison County ($29,485 per capita income) vs Massachusetts: Hampshire County ($65,432).
- Hampshire County's income is 2.2 times (122%) richer than Madison County's.
Idaho vs Massachusetts Taxes
State income tax
- Idaho has a top income tax rate of 5.3%, while Massachusetts has a top income tax rate of 9%.
- Massachusetts's top rate is 3.7 percentage points higher.
Property tax
- Idaho: 0.43% effective rate vs Massachusetts: 1% of home value per year.
- Massachusetts's rate is 0.57 percentage points higher.
Sales tax
- Idaho: 6.03% combined state and average local rate vs Massachusetts: 6.25%.
- Massachusetts's combined rate is 0.22 percentage points higher.
Official Websites
Idaho official website · Massachusetts official website
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More Size Comparisons
All Idaho size comparisons · All Massachusetts 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.