The map above shows Indiana and Oklahoma side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Indiana vs Oklahoma Geography
Land area: Indiana has a land area of 35,825 square miles (92,787 km²), while Oklahoma has 68,597 square miles (177,665 km²). Oklahoma's land area is 1.9 times (91%) larger than Indiana's.
Total area: Indiana: 36,421 square miles (94,331 km²) vs Oklahoma: 69,899 square miles (181,038 km²), including inland and coastal water. Oklahoma's total area is 1.9 times (92%) larger than Indiana's.
Length: Indiana is 276 miles (444 km) long from north to south; Oklahoma is 533 miles (857 km). Oklahoma's north-south length is 1.9 times (93%) longer than Indiana's.
Width: Indiana spans 193 miles (310 km) east to west; Oklahoma spans 490 miles (789 km). Oklahoma's east-west width is 2.5 times (154%) wider than Indiana's.
Highest point: Indiana's highest point is Hoosier Hill at 1,255 feet (383 m); Oklahoma's is Black Mesa at 4,980 feet (1,518 m). Black Mesa is 3,725 feet higher than Hoosier Hill.
Lowest point: Indiana's lowest point is Ohio River at 330 feet; Oklahoma's is Little River at 289 feet. Oklahoma's lowest point is 41 feet lower.
Indiana vs Oklahoma Population and History
Population: Indiana has a population of 6,924,275 (2024), while Oklahoma has 4,095,393 (2024). Indiana's population is 1.7 times (69%) larger than Oklahoma's.
Population density: Indiana: 193.3 people per square mile vs Oklahoma: 59.7. Indiana's population density is 3.2 times (224%) higher than Oklahoma's.
Biggest city: Indiana's biggest city is Indianapolis with 891,484 people; Oklahoma's is Oklahoma City with 712,919. Indianapolis' population is 1.3 times (25%) larger than Oklahoma City's.
Largest metro area: Indiana's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs Oklahoma's Oklahoma City, OK metro area (1,497,821). Chicago-Naperville-Elgin, IL-IN metro area's population is 6.3 times (528%) larger than Oklahoma City, OK metro area's.
History: Indiana: Admitted to the Union on December 11, 1816, as the 19th state. Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. In its current form, Indiana is the older of the two by 91 years.
Indiana vs Oklahoma Economy
GDP: Indiana's GDP is $519.5 billion (2024) vs Oklahoma's $263.7 billion. Indiana's economic output is 2.0 times (97%) larger than Oklahoma's.
GDP per capita: Indiana: $75,028 per person vs Oklahoma: $64,388. Indiana's GDP per capita is 1.2 times (17%) higher than Oklahoma's.
Average income: Indiana: $64,077 vs Oklahoma: $63,708 average income per person (per capita personal income). Indiana and Oklahoma have about the same average income.
Indiana vs Oklahoma Counties
Number of counties: Indiana has 92 counties, while Oklahoma has 77. Indiana's county count is 1.2 times (19%) higher than Oklahoma's.
Biggest county by area: Indiana's largest county is Allen County at 657 square miles; Oklahoma's is Osage County at 2,247 square miles. Osage County's land area is 3.4 times (242%) larger than Allen County's.
Smallest county by area: Indiana: Ohio County (86 sq mi) vs Oklahoma: Marshall County (372 sq mi). Marshall County's land area is 4.3 times (331%) larger than Ohio County's.
Most populous county: Indiana: Marion County (981,628 people) vs Oklahoma: Oklahoma County (816,490 people). Marion County's population is 1.2 times (20%) larger than Oklahoma County's.
Least populous county: Indiana: Ohio County (5,996 people) vs Oklahoma: Cimarron County (2,133 people). Ohio County's population is 2.8 times (181%) larger than Cimarron County's.
Richest county: Indiana: Hamilton County ($104,283 per capita income) vs Oklahoma: Washington County ($126,749). Washington County's income is 1.2 times (22%) richer than Hamilton County's.
Poorest county: Indiana: Miami County ($44,940 per capita income) vs Oklahoma: Atoka County ($38,709). Miami County's income is 1.2 times (16%) richer than Atoka County's.
Indiana vs Oklahoma Taxes
State income tax: Indiana has a top income tax rate of 2.95%, while Oklahoma has a top income tax rate of 4.5%. Oklahoma's top rate is 1.55 percentage points higher.
Property tax: Indiana: 0.74% effective rate vs Oklahoma: 0.75% of home value per year. The two are essentially equal.
Sales tax: Indiana: 7% combined state and average local rate vs Oklahoma: 9.06%. Oklahoma's combined rate is 2.06 percentage points higher.
Official Websites
Indiana official website · Oklahoma official website
More Size Comparisons
All Indiana size comparisons · All Oklahoma 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.