The map above shows Idaho and New Hampshire side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs New Hampshire Geography
Land area
- Idaho has a land area of 82,645 square miles (214,051 km²), while New Hampshire has 8,954 square miles (23,190 km²).
- Idaho's land area is 9.2 times (823%) larger than New Hampshire's.
Total area
- Idaho: 83,569 square miles (216,441 km²) vs New Hampshire: 9,350 square miles (24,216 km²), including inland and coastal water.
- Idaho's total area is 8.9 times (794%) larger than New Hampshire's.
Length
- Idaho is 483 miles (778 km) long from north to south; New Hampshire is 180 miles (290 km).
- Idaho's north-south length is 2.7 times (168%) longer than New Hampshire's.
Width
- Idaho spans 352 miles (566 km) east to west; New Hampshire spans 95 miles (152 km).
- Idaho's east-west width is 3.7 times (271%) wider than New Hampshire's.
Highest point
- Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); New Hampshire's is Mount Washington at 6,277 feet (1,913 m).
- Borah Peak is 6,354 feet higher than Mount Washington.
Lowest point
- Idaho's lowest point is Snake River at 718 feet; New Hampshire's is Atlantic Ocean at 0 feet.
- New Hampshire's lowest point is 718 feet lower.
Idaho vs New Hampshire Population and History
Population
- Idaho has a population of 2,001,619 (2024), while New Hampshire has 1,409,032 (2024).
- Idaho's population is 1.4 times (42%) larger than New Hampshire's.
Population density
- Idaho: 24.2 people per square mile vs New Hampshire: 157.4.
- New Hampshire's population density is 6.5 times (550%) higher than Idaho's.
Biggest city
- Idaho's biggest city is Boise with 237,963 people; New Hampshire's is Manchester with 116,386.
- Boise's population is 2.0 times (104%) larger than Manchester's.
Largest metro area
- Idaho's largest metropolitan area is Boise City, ID metro area (845,877 people) vs New Hampshire'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.
- 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 102 years.
Idaho vs New Hampshire Economy
GDP
- Idaho's GDP is $129.0 billion (2024) vs New Hampshire's $119.3 billion.
- Idaho's economic output is 1.1 times (8%) larger than New Hampshire's.
GDP per capita
- Idaho: $64,457 per person vs New Hampshire: $84,694.
- New Hampshire's GDP per capita is 1.3 times (31%) higher than Idaho's.
Average income
- Idaho: $62,323 vs New Hampshire: $83,192 average income per person (per capita personal income).
- New Hampshire's average income is 1.3 times (33%) higher than Idaho's.
Idaho vs New Hampshire Counties
Number of counties
- Idaho has 44 counties, while New Hampshire has 10.
- Idaho's county count is 4.4 times (340%) higher than New Hampshire's.
Biggest county by area
- Idaho's largest county is Idaho County at 8,478 square miles; New Hampshire's is Coos County at 1,795 square miles.
- Idaho County's land area is 4.7 times (372%) larger than Coos County's.
Smallest county by area
- Idaho: Payette County (407 sq mi) vs New Hampshire: Strafford County (368 sq mi).
- Payette County's land area is 1.1 times (11%) larger than Strafford County's.
Most populous county
- Idaho: Ada County (535,799 people) vs New Hampshire: Hillsborough County (430,462 people).
- Ada County's population is 1.2 times (24%) larger than Hillsborough County's.
Least populous county
- Idaho: Clark County (794 people) vs New Hampshire: Coos County (31,094 people).
- Coos County's population is 39.2 times larger than Clark County's.
Richest county
- Idaho: Blaine County ($202,612 per capita income) vs New Hampshire: Rockingham County ($100,216).
- Blaine County's income is 2.0 times (102%) richer than Rockingham County's.
Poorest county
- Idaho: Madison County ($29,485 per capita income) vs New Hampshire: Coos County ($60,657).
- Coos County's income is 2.1 times (106%) richer than Madison County's.
Idaho vs New Hampshire Taxes
State income tax
- Idaho has a top income tax rate of 5.3%, while New Hampshire has no state income tax.
- Idaho's top rate is 5.3 percentage points higher.
Property tax
- Idaho: 0.43% effective rate vs New Hampshire: 1.46% of home value per year.
- New Hampshire's rate is 1.03 percentage points higher.
Sales tax
- Idaho: 6.03% combined state and average local rate vs New Hampshire: 0%.
- Idaho's combined rate is 6.03 percentage points higher.
Official Websites
Idaho official website · New Hampshire official website
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More Size Comparisons
All Idaho 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.