The map above shows Hawaii and Idaho side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Hawaii vs Idaho Geography
Land area: Hawaii has a land area of 6,423 square miles (16,634 km²), while Idaho has 82,645 square miles (214,051 km²). Idaho's land area is 12.9 times larger than Hawaii's.
Total area: Hawaii: 10,970 square miles (28,412 km²) vs Idaho: 83,569 square miles (216,441 km²), including inland and coastal water. Idaho's total area is 7.6 times (662%) larger than Hawaii's.
Length: Hawaii is 333 miles (536 km) long from north to south; Idaho is 483 miles (778 km). Idaho's north-south length is 1.5 times (45%) longer than Hawaii's.
Width: Hawaii spans 386 miles (621 km) east to west; Idaho spans 352 miles (566 km). Hawaii's east-west width is 1.1 times (10%) wider than Idaho's.
Highest point: Hawaii's highest point is Mauna Kea at 13,795 feet (4,205 m); Idaho's is Borah Peak at 12,631 feet (3,850 m). Mauna Kea is 1,164 feet higher than Borah Peak.
Lowest point: Hawaii's lowest point is Pacific Ocean at 0 feet; Idaho's is Snake River at 718 feet. Hawaii's lowest point is 718 feet lower.
Hawaii vs Idaho Population and History
Population: Hawaii has a population of 1,446,146 (2024), while Idaho has 2,001,619 (2024). Idaho's population is 1.4 times (38%) larger than Hawaii's.
Population density: Hawaii: 225.2 people per square mile vs Idaho: 24.2. Hawaii's population density is 9.3 times (831%) higher than Idaho's.
Biggest city: Hawaii's biggest city is Honolulu with 344,967 people; Idaho's is Boise with 237,963. Honolulu's population is 1.4 times (45%) larger than Boise's.
Largest metro area: Hawaii's largest metropolitan area is Urban Honolulu, HI metro area (998,747 people) vs Idaho's Boise City, ID metro area (845,877). Urban Honolulu, HI metro area's population is 1.2 times (18%) larger than Boise City, ID metro area's.
History: Hawaii: Admitted to the Union on August 21, 1959, as the 50th state. Idaho: Admitted to the Union on July 3, 1890, as the 43rd state. In its current form, Idaho is the older of the two by 69 years.
Hawaii vs Idaho Economy
GDP: Hawaii's GDP is $117.6 billion (2024) vs Idaho's $129.0 billion. Idaho's economic output is 1.1 times (10%) larger than Hawaii's.
GDP per capita: Hawaii: $81,339 per person vs Idaho: $64,457. Hawaii's GDP per capita is 1.3 times (26%) higher than Idaho's.
Average income: Hawaii: $71,019 vs Idaho: $62,323 average income per person (per capita personal income). Hawaii's average income is 1.1 times (14%) higher than Idaho's.
Hawaii vs Idaho Counties
Number of counties: Hawaii has 5 counties, while Idaho has 44. Idaho's county count is 8.8 times (780%) higher than Hawaii's.
Biggest county by area: Hawaii's largest county is Hawaii County at 4,028 square miles; Idaho's is Idaho County at 8,478 square miles. Idaho County's land area is 2.1 times (110%) larger than Hawaii County's.
Smallest county by area: Hawaii: Kalawao County (12 sq mi) vs Idaho: Payette County (407 sq mi). Payette County's land area is 33.9 times larger than Kalawao County's.
Most populous county: Hawaii: Honolulu County (998,747 people) vs Idaho: Ada County (535,799 people). Honolulu County's population is 1.9 times (86%) larger than Ada County's.
Least populous county: Hawaii: Kalawao County (81 people) vs Idaho: Clark County (794 people). Clark County's population is 9.8 times (880%) larger than Kalawao County's.
Richest county: Hawaii: Honolulu County ($74,681 per capita income) vs Idaho: Blaine County ($202,612). Blaine County's income is 2.7 times (171%) richer than Honolulu County's.
Poorest county: Hawaii: Hawaii County ($57,694 per capita income) vs Idaho: Madison County ($29,485). Hawaii County's income is 2.0 times (96%) richer than Madison County's.
Hawaii vs Idaho Taxes
State income tax: Hawaii has a top income tax rate of 11%, while Idaho has a top income tax rate of 5.3%. Hawaii's top rate is 5.7 percentage points higher.
Property tax: Hawaii: 0.27% effective rate vs Idaho: 0.43% of home value per year. Idaho's rate is 0.16 percentage points higher.
Sales tax: Hawaii: 4.5% combined state and average local rate vs Idaho: 6.03%. Idaho's combined rate is 1.53 percentage points higher.
Official Websites
Hawaii official website · Idaho official website
More Size Comparisons
All Hawaii size comparisons · All Idaho 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.