The map above shows Idaho and Indiana side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs Indiana Geography
Land area
- Idaho has a land area of 82,645 square miles (214,051 km²), while Indiana has 35,825 square miles (92,787 km²).
- Idaho's land area is 2.3 times (131%) larger than Indiana's.
Total area
- Idaho: 83,569 square miles (216,441 km²) vs Indiana: 36,421 square miles (94,331 km²), including inland and coastal water.
- Idaho's total area is 2.3 times (129%) larger than Indiana's.
Length
- Idaho is 483 miles (778 km) long from north to south; Indiana is 276 miles (444 km).
- Idaho's north-south length is 1.8 times (75%) longer than Indiana's.
Width
- Idaho spans 352 miles (566 km) east to west; Indiana spans 193 miles (310 km).
- Idaho's east-west width is 1.8 times (82%) wider than Indiana's.
Highest point
- Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); Indiana's is Hoosier Hill at 1,255 feet (383 m).
- Borah Peak is 11,376 feet higher than Hoosier Hill.
Lowest point
- Idaho's lowest point is Snake River at 718 feet; Indiana's is Ohio River at 330 feet.
- Indiana's lowest point is 388 feet lower.
Idaho vs Indiana Population and History
Population
- Idaho has a population of 2,001,619 (2024), while Indiana has 6,924,275 (2024).
- Indiana's population is 3.5 times (246%) larger than Idaho's.
Population density
- Idaho: 24.2 people per square mile vs Indiana: 193.3.
- Indiana's population density is 8.0 times (699%) higher than Idaho's.
Biggest city
- Idaho's biggest city is Boise with 237,963 people; Indiana's is Indianapolis with 891,484.
- Indianapolis' population is 3.7 times (275%) larger than Boise's.
Largest metro area
- Idaho's largest metropolitan area is Boise City, ID metro area (845,877 people) vs Indiana's Chicago-Naperville-Elgin, IL-IN metro area (9,408,576).
- Chicago-Naperville-Elgin, IL-IN metro area's population is 11.1 times larger than Boise City, ID metro area's.
History
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd state.
- Indiana: Admitted to the Union on December 11, 1816, as the 19th state.
- In its current form, Indiana is the older of the two by 74 years.
Idaho vs Indiana Economy
GDP
- Idaho's GDP is $129.0 billion (2024) vs Indiana's $519.5 billion.
- Indiana's economic output is 4.0 times (303%) larger than Idaho's.
GDP per capita
- Idaho: $64,457 per person vs Indiana: $75,028.
- Indiana's GDP per capita is 1.2 times (16%) higher than Idaho's.
Average income
- Idaho: $62,323 vs Indiana: $64,077 average income per person (per capita personal income).
- Idaho and Indiana have about the same average income.
Idaho vs Indiana Counties
Number of counties
- Idaho has 44 counties, while Indiana has 92.
- Indiana's county count is 2.1 times (109%) higher than Idaho's.
Biggest county by area
- Idaho's largest county is Idaho County at 8,478 square miles; Indiana's is Allen County at 657 square miles.
- Idaho County's land area is 12.9 times larger than Allen County's.
Smallest county by area
- Idaho: Payette County (407 sq mi) vs Indiana: Ohio County (86 sq mi).
- Payette County's land area is 4.7 times (372%) larger than Ohio County's.
Most populous county
- Idaho: Ada County (535,799 people) vs Indiana: Marion County (981,628 people).
- Marion County's population is 1.8 times (83%) larger than Ada County's.
Least populous county
- Idaho: Clark County (794 people) vs Indiana: Ohio County (5,996 people).
- Ohio County's population is 7.6 times (655%) larger than Clark County's.
Richest county
- Idaho: Blaine County ($202,612 per capita income) vs Indiana: Hamilton County ($104,283).
- Blaine County's income is 1.9 times (94%) richer than Hamilton County's.
Poorest county
- Idaho: Madison County ($29,485 per capita income) vs Indiana: Miami County ($44,940).
- Miami County's income is 1.5 times (52%) richer than Madison County's.
Idaho vs Indiana Taxes
State income tax
- Idaho has a top income tax rate of 5.3%, while Indiana has a top income tax rate of 2.95%.
- Idaho's top rate is 2.35 percentage points higher.
Property tax
- Idaho: 0.43% effective rate vs Indiana: 0.74% of home value per year.
- Indiana's rate is 0.31 percentage points higher.
Sales tax
- Idaho: 6.03% combined state and average local rate vs Indiana: 7%.
- Indiana's combined rate is 0.97 percentage points higher.
Official Websites
Idaho official website · Indiana official website
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More Size Comparisons
All Idaho size comparisons · All Indiana 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.