The map above shows Delaware and Idaho side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Delaware vs Idaho Geography
Land area: Delaware has a land area of 1,949 square miles (5,047 km²), while Idaho has 82,645 square miles (214,051 km²). Idaho's land area is 42.4 times larger than Delaware's.
Total area: Delaware: 2,489 square miles (6,446 km²) vs Idaho: 83,569 square miles (216,441 km²), including inland and coastal water. Idaho's total area is 33.6 times larger than Delaware's.
Length: Delaware is 98 miles (158 km) long from north to south; Idaho is 483 miles (778 km). Idaho's north-south length is 4.9 times (393%) longer than Delaware's.
Width: Delaware spans 96 miles (155 km) east to west; Idaho spans 352 miles (566 km). Idaho's east-west width is 3.7 times (267%) wider than Delaware's.
Highest point: Delaware's highest point is Ebright Azimuth at 450 feet (137 m); Idaho's is Borah Peak at 12,631 feet (3,850 m). Borah Peak is 12,181 feet higher than Ebright Azimuth.
Lowest point: Delaware's lowest point is Atlantic Ocean at 0 feet; Idaho's is Snake River at 718 feet. Delaware's lowest point is 718 feet lower.
Delaware vs Idaho Population and History
Population: Delaware has a population of 1,051,917 (2024), while Idaho has 2,001,619 (2024). Idaho's population is 1.9 times (90%) larger than Delaware's.
Population density: Delaware: 539.9 people per square mile vs Idaho: 24.2. Delaware's population density is 22.3 times higher than Idaho's.
Biggest city: Delaware's biggest city is Wilmington with 73,176 people; Idaho's is Boise with 237,963. Boise's population is 3.3 times (225%) larger than Wilmington's.
Largest metro area: Delaware's largest metropolitan area is Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area (6,330,422 people) vs Idaho's Boise City, ID metro area (845,877). Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area's population is 7.5 times (648%) larger than Boise City, ID metro area's.
History: Delaware: Admitted to the Union on December 7, 1787, as the 1st state. Idaho: Admitted to the Union on July 3, 1890, as the 43rd state. In its current form, Delaware is the older of the two by 103 years.
Delaware vs Idaho Economy
GDP: Delaware's GDP is $111.0 billion (2024) vs Idaho's $129.0 billion. Idaho's economic output is 1.2 times (16%) larger than Delaware's.
GDP per capita: Delaware: $105,495 per person vs Idaho: $64,457. Delaware's GDP per capita is 1.6 times (64%) higher than Idaho's.
Average income: Delaware: $68,061 vs Idaho: $62,323 average income per person (per capita personal income). Delaware's average income is 1.1 times (9%) higher than Idaho's.
Delaware vs Idaho Counties
Number of counties: Delaware has 3 counties, while Idaho has 44. Idaho's county count is 14.7 times higher than Delaware's.
Biggest county by area: Delaware's largest county is Sussex County at 936 square miles; Idaho's is Idaho County at 8,478 square miles. Idaho County's land area is 9.1 times (806%) larger than Sussex County's.
Smallest county by area: Delaware: New Castle County (426 sq mi) vs Idaho: Payette County (407 sq mi). New Castle County's land area is 1.0 times (5%) larger than Payette County's.
Most populous county: Delaware: New Castle County (588,093 people) vs Idaho: Ada County (535,799 people). New Castle County's population is 1.1 times (10%) larger than Ada County's.
Least populous county: Delaware: Kent County (192,690 people) vs Idaho: Clark County (794 people). Kent County's population is 242.7 times larger than Clark County's.
Richest county: Delaware: Sussex County ($73,647 per capita income) vs Idaho: Blaine County ($202,612). Blaine County's income is 2.8 times (175%) richer than Sussex County's.
Poorest county: Delaware: Kent County ($55,474 per capita income) vs Idaho: Madison County ($29,485). Kent County's income is 1.9 times (88%) richer than Madison County's.
Delaware vs Idaho Taxes
State income tax: Delaware has a top income tax rate of 6.6%, while Idaho has a top income tax rate of 5.3%. Delaware's top rate is 1.3 percentage points higher.
Property tax: Delaware: 0.47% effective rate vs Idaho: 0.43% of home value per year. Delaware's rate is 0.04 percentage points higher.
Sales tax: Delaware: 0% combined state and average local rate vs Idaho: 6.03%. Idaho's combined rate is 6.03 percentage points higher.
Official Websites
Delaware official website · Idaho official website
More Size Comparisons
All Delaware 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.