The map above shows Idaho and North Dakota side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs North Dakota Geography
Land area
- Idaho has a land area of 82,645 square miles (214,051 km²), while North Dakota has 68,994 square miles (178,694 km²).
- Idaho's land area is 1.2 times (20%) larger than North Dakota's.
Total area
- Idaho: 83,569 square miles (216,441 km²) vs North Dakota: 70,699 square miles (183,109 km²), including inland and coastal water.
- Idaho's total area is 1.2 times (18%) larger than North Dakota's.
Length
- Idaho is 483 miles (778 km) long from north to south; North Dakota is 338 miles (544 km).
- Idaho's north-south length is 1.4 times (43%) longer than North Dakota's.
Width
- Idaho spans 352 miles (566 km) east to west; North Dakota spans 408 miles (657 km).
- North Dakota's east-west width is 1.2 times (16%) wider than Idaho's.
Highest point
- Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); North Dakota's is White Butte at 3,500 feet (1,067 m).
- Borah Peak is 9,131 feet higher than White Butte.
Lowest point
- Idaho's lowest point is Snake River at 718 feet; North Dakota's is Red River of the North at 754 feet.
- Idaho's lowest point is 36 feet lower.
Idaho vs North Dakota Population and History
Population
- Idaho has a population of 2,001,619 (2024), while North Dakota has 796,568 (2024).
- Idaho's population is 2.5 times (151%) larger than North Dakota's.
Population density
- Idaho: 24.2 people per square mile vs North Dakota: 11.5.
- Idaho's population density is 2.1 times (110%) higher than North Dakota's.
Biggest city
- Idaho's biggest city is Boise with 237,963 people; North Dakota's is Fargo with 136,285.
- Boise's population is 1.7 times (75%) larger than Fargo's.
Largest metro area
- Idaho's largest metropolitan area is Boise City, ID metro area (845,877 people) vs North Dakota's Fargo, ND-MN metro area (267,793).
- Boise City, ID metro area's population is 3.2 times (216%) larger than Fargo, ND-MN metro area's.
History
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd state.
- North Dakota: Admitted to the Union on November 2, 1889, as the 39th state.
- In its current form, North Dakota is the older of the two by 1 years.
Idaho vs North Dakota Economy
GDP
- Idaho's GDP is $129.0 billion (2024) vs North Dakota's $80.1 billion.
- Idaho's economic output is 1.6 times (61%) larger than North Dakota's.
GDP per capita
- Idaho: $64,457 per person vs North Dakota: $100,504.
- North Dakota's GDP per capita is 1.6 times (56%) higher than Idaho's.
Average income
- Idaho: $62,323 vs North Dakota: $71,749 average income per person (per capita personal income).
- North Dakota's average income is 1.2 times (15%) higher than Idaho's.
Idaho vs North Dakota Counties
Number of counties
- Idaho has 44 counties, while North Dakota has 53.
- North Dakota's county count is 1.2 times (20%) higher than Idaho's.
Biggest county by area
- Idaho's largest county is Idaho County at 8,478 square miles; North Dakota's is McKenzie County at 2,760 square miles.
- Idaho County's land area is 3.1 times (207%) larger than McKenzie County's.
Smallest county by area
- Idaho: Payette County (407 sq mi) vs North Dakota: Eddy County (630 sq mi).
- Eddy County's land area is 1.5 times (55%) larger than Payette County's.
Most populous county
- Idaho: Ada County (535,799 people) vs North Dakota: Cass County (200,945 people).
- Ada County's population is 2.7 times (167%) larger than Cass County's.
Least populous county
- Idaho: Clark County (794 people) vs North Dakota: Slope County (660 people).
- Clark County's population is 1.2 times (20%) larger than Slope County's.
Richest county
- Idaho: Blaine County ($202,612 per capita income) vs North Dakota: Dunn County ($99,793).
- Blaine County's income is 2.0 times (103%) richer than Dunn County's.
Poorest county
- Idaho: Madison County ($29,485 per capita income) vs North Dakota: Sioux County ($33,782).
- Sioux County's income is 1.1 times (15%) richer than Madison County's.
Idaho vs North Dakota Taxes
State income tax
- Idaho has a top income tax rate of 5.3%, while North Dakota has a top income tax rate of 2.5%.
- Idaho's top rate is 2.8 percentage points higher.
Property tax
- Idaho: 0.43% effective rate vs North Dakota: 0.96% of home value per year.
- North Dakota's rate is 0.53 percentage points higher.
Sales tax
- Idaho: 6.03% combined state and average local rate vs North Dakota: 7.09%.
- North Dakota's combined rate is 1.06 percentage points higher.
Official Websites
Idaho official website · North Dakota official website
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More Size Comparisons
All Idaho size comparisons · All North Dakota 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.