The map above shows Idaho and South Carolina side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs South Carolina Geography
Land area
- Idaho has a land area of 82,645 square miles (214,051 km²), while South Carolina has 30,064 square miles (77,866 km²).
- Idaho's land area is 2.7 times (175%) larger than South Carolina's.
Total area
- Idaho: 83,569 square miles (216,441 km²) vs South Carolina: 32,024 square miles (82,940 km²), including inland and coastal water.
- Idaho's total area is 2.6 times (161%) larger than South Carolina's.
Length
- Idaho is 483 miles (778 km) long from north to south; South Carolina is 236 miles (380 km).
- Idaho's north-south length is 2.0 times (105%) longer than South Carolina's.
Width
- Idaho spans 352 miles (566 km) east to west; South Carolina spans 279 miles (449 km).
- Idaho's east-west width is 1.3 times (26%) wider than South Carolina's.
Highest point
- Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); South Carolina's is Sassafras Mountain at 3,497 feet (1,066 m).
- Borah Peak is 9,134 feet higher than Sassafras Mountain.
Lowest point
- Idaho's lowest point is Snake River at 718 feet; South Carolina's is Atlantic Ocean at 0 feet.
- South Carolina's lowest point is 718 feet lower.
Idaho vs South Carolina Population and History
Population
- Idaho has a population of 2,001,619 (2024), while South Carolina has 5,478,831 (2024).
- South Carolina's population is 2.7 times (174%) larger than Idaho's.
Population density
- Idaho: 24.2 people per square mile vs South Carolina: 182.2.
- South Carolina's population density is 7.5 times (653%) higher than Idaho's.
Biggest city
- Idaho's biggest city is Boise with 237,963 people; South Carolina's is Charleston with 157,665.
- Boise's population is 1.5 times (51%) larger than Charleston's.
Largest metro area
- Idaho's largest metropolitan area is Boise City, ID metro area (845,877 people) vs South Carolina's Charlotte-Concord-Gastonia, NC-SC metro area (2,883,370).
- Charlotte-Concord-Gastonia, NC-SC metro area's population is 3.4 times (241%) larger than Boise City, ID metro area's.
History
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd state.
- South Carolina: Admitted to the Union on May 23, 1788, as the 8th state.
- In its current form, South Carolina is the older of the two by 102 years.
Idaho vs South Carolina Economy
GDP
- Idaho's GDP is $129.0 billion (2024) vs South Carolina's $357.1 billion.
- South Carolina's economic output is 2.8 times (177%) larger than Idaho's.
GDP per capita
- Idaho: $64,457 per person vs South Carolina: $65,173.
- Idaho and South Carolina have about the same GDP per capita.
Average income
- Idaho: $62,323 vs South Carolina: $60,776 average income per person (per capita personal income).
- Idaho and South Carolina have about the same average income.
Idaho vs South Carolina Counties
Number of counties
- Idaho has 44 counties, while South Carolina has 46.
- Idaho and South Carolina have about the same county count.
Biggest county by area
- Idaho's largest county is Idaho County at 8,478 square miles; South Carolina's is Horry County at 1,133 square miles.
- Idaho County's land area is 7.5 times (648%) larger than Horry County's.
Smallest county by area
- Idaho: Payette County (407 sq mi) vs South Carolina: McCormick County (359 sq mi).
- Payette County's land area is 1.1 times (13%) larger than McCormick County's.
Most populous county
- Idaho: Ada County (535,799 people) vs South Carolina: Greenville County (570,745 people).
- Greenville County's population is 1.1 times (7%) larger than Ada County's.
Least populous county
- Idaho: Clark County (794 people) vs South Carolina: Allendale County (7,551 people).
- Allendale County's population is 9.5 times (851%) larger than Clark County's.
Richest county
- Idaho: Blaine County ($202,612 per capita income) vs South Carolina: Charleston County ($90,550).
- Blaine County's income is 2.2 times (124%) richer than Charleston County's.
Poorest county
- Idaho: Madison County ($29,485 per capita income) vs South Carolina: Marlboro County ($41,332).
- Marlboro County's income is 1.4 times (40%) richer than Madison County's.
Idaho vs South Carolina Taxes
State income tax
- Idaho has a top income tax rate of 5.3%, while South Carolina has a top income tax rate of 6%.
- South Carolina's top rate is 0.7 percentage points higher.
Property tax
- Idaho: 0.43% effective rate vs South Carolina: 0.45% of home value per year.
- South Carolina's rate is 0.02 percentage points higher.
Sales tax
- Idaho: 6.03% combined state and average local rate vs South Carolina: 7.49%.
- South Carolina's combined rate is 1.46 percentage points higher.
Official Websites
Idaho official website · South Carolina official website
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More Size Comparisons
All Idaho size comparisons · All South Carolina 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.