The map above shows District of Columbia and Idaho side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
District of Columbia vs Idaho Geography
Land area
- District of Columbia has a land area of 61 square miles (158 km²), while Idaho has 82,645 square miles (214,051 km²).
- Idaho's land area is 1,354.8 times larger than District of Columbia's.
Total area
- District of Columbia: 68 square miles (177 km²) vs Idaho: 83,569 square miles (216,441 km²), including inland and coastal water.
- Idaho's total area is 1,222.8 times larger than District of Columbia's.
Length
- District of Columbia is 13 miles (22 km) long from north to south; Idaho is 483 miles (778 km).
- Idaho's north-south length is 37.2 times longer than District of Columbia's.
Width
- District of Columbia spans 12 miles (19 km) east to west; Idaho spans 352 miles (566 km).
- Idaho's east-west width is 29.3 times wider than District of Columbia's.
Highest point
- District of Columbia's highest point is Fort Reno at 429 feet (131 m); Idaho's is Borah Peak at 12,631 feet (3,850 m).
- Borah Peak is 12,202 feet higher than Fort Reno.
Lowest point
- District of Columbia's lowest point is Potomac River at 0 feet; Idaho's is Snake River at 718 feet.
- District of Columbia's lowest point is 718 feet lower.
District of Columbia vs Idaho Population and History
Population
- District of Columbia has a population of 702,250 (2024), while Idaho has 2,001,619 (2024).
- Idaho's population is 2.9 times (185%) larger than District of Columbia's.
Population density
- District of Columbia: 11,493.5 people per square mile vs Idaho: 24.2.
- District of Columbia's population density is 474.9 times higher than Idaho's.
Biggest city
- District of Columbia's biggest city is Washington with 702,250 people; Idaho's is Boise with 237,963.
- Washington's population is 3.0 times (195%) larger than Boise's.
Largest metro area
- District of Columbia's largest metropolitan area is Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489 people) vs Idaho's Boise City, ID metro area (845,877).
- Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's population is 7.6 times (661%) larger than Boise City, ID metro area's.
History
- District of Columbia: The federal district, established by the Residence Act on July 16, 1790; not a state.
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd state.
- In its current form, District of Columbia is the older of the two by 100 years.
District of Columbia vs Idaho Economy
GDP
- District of Columbia's GDP is $184.3 billion (2024) vs Idaho's $129.0 billion.
- District of Columbia's economic output is 1.4 times (43%) larger than Idaho's.
GDP per capita
- District of Columbia: $262,439 per person vs Idaho: $64,457.
- District of Columbia's GDP per capita is 4.1 times (307%) higher than Idaho's.
Average income
- District of Columbia: $111,185 vs Idaho: $62,323 average income per person (per capita personal income).
- District of Columbia's average income is 1.8 times (78%) higher than Idaho's.
District of Columbia vs Idaho Counties
Number of counties
- District of Columbia has 1 counties, while Idaho has 44.
- Idaho's county count is 44.0 times higher than District of Columbia's.
Biggest county by area
- District of Columbia's largest county is District of Columbia at 61 square miles; Idaho's is Idaho County at 8,478 square miles.
- Idaho County's land area is 138.7 times larger than District of Columbia's.
Smallest county by area
- District of Columbia: District of Columbia (61 sq mi) vs Idaho: Payette County (407 sq mi).
- Payette County's land area is 6.7 times (566%) larger than District of Columbia's.
Most populous county
- District of Columbia: District of Columbia (702,250 people) vs Idaho: Ada County (535,799 people).
- District of Columbia's population is 1.3 times (31%) larger than Ada County's.
Least populous county
- District of Columbia: District of Columbia (702,250 people) vs Idaho: Clark County (794 people).
- District of Columbia's population is 884.4 times larger than Clark County's.
Richest county
- District of Columbia: District of Columbia ($111,185 per capita income) vs Idaho: Blaine County ($202,612).
- Blaine County's income is 1.8 times (82%) richer than District of Columbia's.
Poorest county
- District of Columbia: District of Columbia ($111,185 per capita income) vs Idaho: Madison County ($29,485).
- District of Columbia's income is 3.8 times (277%) richer than Madison County's.
District of Columbia vs Idaho Taxes
State income tax
- District of Columbia has a top income tax rate of 10.75%, while Idaho has a top income tax rate of 5.3%.
- District of Columbia's top rate is 5.45 percentage points higher.
Property tax
- District of Columbia: 0.63% effective rate vs Idaho: 0.43% of home value per year.
- District of Columbia's rate is 0.2 percentage points higher.
Sales tax
- District of Columbia: 6% combined state and average local rate vs Idaho: 6.03%.
- Idaho's combined rate is 0.03 percentage points higher.
Official Websites
District of Columbia official website · Idaho official website
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More Size Comparisons
All District of Columbia 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.