The map above shows Oklahoma and South Carolina side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Oklahoma vs South Carolina Geography
Land area: Oklahoma has a land area of 68,597 square miles (177,665 km²), while South Carolina has 30,064 square miles (77,866 km²). Oklahoma's land area is 2.3 times (128%) larger than South Carolina's.
Total area: Oklahoma: 69,899 square miles (181,038 km²) vs South Carolina: 32,024 square miles (82,940 km²), including inland and coastal water. Oklahoma's total area is 2.2 times (118%) larger than South Carolina's.
Length: Oklahoma is 533 miles (857 km) long from north to south; South Carolina is 236 miles (380 km). Oklahoma's north-south length is 2.3 times (126%) longer than South Carolina's.
Width: Oklahoma spans 490 miles (789 km) east to west; South Carolina spans 279 miles (449 km). Oklahoma's east-west width is 1.8 times (76%) wider than South Carolina's.
Highest point: Oklahoma's highest point is Black Mesa at 4,980 feet (1,518 m); South Carolina's is Sassafras Mountain at 3,497 feet (1,066 m). Black Mesa is 1,483 feet higher than Sassafras Mountain.
Lowest point: Oklahoma's lowest point is Little River at 289 feet; South Carolina's is Atlantic Ocean at 0 feet. South Carolina's lowest point is 289 feet lower.
Oklahoma vs South Carolina Population and History
Population: Oklahoma has a population of 4,095,393 (2024), while South Carolina has 5,478,831 (2024). South Carolina's population is 1.3 times (34%) larger than Oklahoma's.
Population density: Oklahoma: 59.7 people per square mile vs South Carolina: 182.2. South Carolina's population density is 3.1 times (205%) higher than Oklahoma's.
Biggest city: Oklahoma's biggest city is Oklahoma City with 712,919 people; South Carolina's is Charleston with 157,665. Oklahoma City's population is 4.5 times (352%) larger than Charleston's.
Largest metro area: Oklahoma's largest metropolitan area is Oklahoma City, OK metro area (1,497,821 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 1.9 times (93%) larger than Oklahoma City, OK metro area's.
History: Oklahoma: Admitted to the Union on November 16, 1907, as the 46th 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 119 years.
Oklahoma vs South Carolina Economy
GDP: Oklahoma's GDP is $263.7 billion (2024) vs South Carolina's $357.1 billion. South Carolina's economic output is 1.4 times (35%) larger than Oklahoma's.
GDP per capita: Oklahoma: $64,388 per person vs South Carolina: $65,173. Oklahoma and South Carolina have about the same GDP per capita.
Average income: Oklahoma: $63,708 vs South Carolina: $60,776 average income per person (per capita personal income). Oklahoma's average income is 1.0 times (5%) higher than South Carolina's.
Oklahoma vs South Carolina Counties
Number of counties: Oklahoma has 77 counties, while South Carolina has 46. Oklahoma's county count is 1.7 times (67%) higher than South Carolina's.
Biggest county by area: Oklahoma's largest county is Osage County at 2,247 square miles; South Carolina's is Horry County at 1,133 square miles. Osage County's land area is 2.0 times (98%) larger than Horry County's.
Smallest county by area: Oklahoma: Marshall County (372 sq mi) vs South Carolina: McCormick County (359 sq mi). Marshall County and McCormick County have about the same land area.
Most populous county: Oklahoma: Oklahoma County (816,490 people) vs South Carolina: Greenville County (570,745 people). Oklahoma County's population is 1.4 times (43%) larger than Greenville County's.
Least populous county: Oklahoma: Cimarron County (2,133 people) vs South Carolina: Allendale County (7,551 people). Allendale County's population is 3.5 times (254%) larger than Cimarron County's.
Richest county: Oklahoma: Washington County ($126,749 per capita income) vs South Carolina: Charleston County ($90,550). Washington County's income is 1.4 times (40%) richer than Charleston County's.
Poorest county: Oklahoma: Atoka County ($38,709 per capita income) vs South Carolina: Marlboro County ($41,332). Marlboro County's income is 1.1 times (7%) richer than Atoka County's.
Oklahoma vs South Carolina Taxes
State income tax: Oklahoma has a top income tax rate of 4.5%, while South Carolina has a top income tax rate of 6%. South Carolina's top rate is 1.5 percentage points higher.
Property tax: Oklahoma: 0.75% effective rate vs South Carolina: 0.45% of home value per year. Oklahoma's rate is 0.3 percentage points higher.
Sales tax: Oklahoma: 9.06% combined state and average local rate vs South Carolina: 7.49%. Oklahoma's combined rate is 1.57 percentage points higher.
Official Websites
Oklahoma official website · South Carolina official website
More Size Comparisons
All Oklahoma 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.