The map above shows Kentucky and Oklahoma side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Kentucky vs Oklahoma Geography
Land area: Kentucky has a land area of 39,485 square miles (102,267 km²), while Oklahoma has 68,597 square miles (177,665 km²). Oklahoma's land area is 1.7 times (74%) larger than Kentucky's.
Total area: Kentucky: 40,406 square miles (104,651 km²) vs Oklahoma: 69,899 square miles (181,038 km²), including inland and coastal water. Oklahoma's total area is 1.7 times (73%) larger than Kentucky's.
Length: Kentucky is 257 miles (414 km) long from north to south; Oklahoma is 533 miles (857 km). Oklahoma's north-south length is 2.1 times (107%) longer than Kentucky's.
Width: Kentucky spans 418 miles (672 km) east to west; Oklahoma spans 490 miles (789 km). Oklahoma's east-west width is 1.2 times (17%) wider than Kentucky's.
Highest point: Kentucky's highest point is Black Mountain at 4,134 feet (1,260 m); Oklahoma's is Black Mesa at 4,980 feet (1,518 m). Black Mesa is 846 feet higher than Black Mountain.
Lowest point: Kentucky's lowest point is Mississippi River at 270 feet; Oklahoma's is Little River at 289 feet. Kentucky's lowest point is 19 feet lower.
Kentucky vs Oklahoma Population and History
Population: Kentucky has a population of 4,588,372 (2024), while Oklahoma has 4,095,393 (2024). Kentucky's population is 1.1 times (12%) larger than Oklahoma's.
Population density: Kentucky: 116.2 people per square mile vs Oklahoma: 59.7. Kentucky's population density is 1.9 times (95%) higher than Oklahoma's.
Biggest city: Kentucky's biggest city is Louisville with 640,796 people; Oklahoma's is Oklahoma City with 712,919. Oklahoma City's population is 1.1 times (11%) larger than Louisville's.
Largest metro area: Kentucky's largest metropolitan area is Cincinnati, OH-KY-IN metro area (2,302,815 people) vs Oklahoma's Oklahoma City, OK metro area (1,497,821). Cincinnati, OH-KY-IN metro area's population is 1.5 times (54%) larger than Oklahoma City, OK metro area's.
History: Kentucky: Admitted to the Union on June 1, 1792, as the 15th state. Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. In its current form, Kentucky is the older of the two by 115 years.
Kentucky vs Oklahoma Economy
GDP: Kentucky's GDP is $295.4 billion (2024) vs Oklahoma's $263.7 billion. Kentucky's economic output is 1.1 times (12%) larger than Oklahoma's.
GDP per capita: Kentucky: $64,375 per person vs Oklahoma: $64,388. Kentucky and Oklahoma have about the same GDP per capita.
Average income: Kentucky: $58,256 vs Oklahoma: $63,708 average income per person (per capita personal income). Oklahoma's average income is 1.1 times (9%) higher than Kentucky's.
Kentucky vs Oklahoma Counties
Number of counties: Kentucky has 120 counties, while Oklahoma has 77. Kentucky's county count is 1.6 times (56%) higher than Oklahoma's.
Biggest county by area: Kentucky's largest county is Pike County at 786 square miles; Oklahoma's is Osage County at 2,247 square miles. Osage County's land area is 2.9 times (186%) larger than Pike County's.
Smallest county by area: Kentucky: Gallatin County (98 sq mi) vs Oklahoma: Marshall County (372 sq mi). Marshall County's land area is 3.8 times (278%) larger than Gallatin County's.
Most populous county: Kentucky: Jefferson County (793,881 people) vs Oklahoma: Oklahoma County (816,490 people). Jefferson County and Oklahoma County have about the same population.
Least populous county: Kentucky: Robertson County (2,382 people) vs Oklahoma: Cimarron County (2,133 people). Robertson County's population is 1.1 times (12%) larger than Cimarron County's.
Richest county: Kentucky: Oldham County ($87,137 per capita income) vs Oklahoma: Washington County ($126,749). Washington County's income is 1.5 times (45%) richer than Oldham County's.
Poorest county: Kentucky: Elliott County ($31,817 per capita income) vs Oklahoma: Atoka County ($38,709). Atoka County's income is 1.2 times (22%) richer than Elliott County's.
Kentucky vs Oklahoma Taxes
State income tax: Kentucky has a top income tax rate of 3.5%, while Oklahoma has a top income tax rate of 4.5%. Oklahoma's top rate is 1 percentage points higher.
Property tax: Kentucky: 0.71% effective rate vs Oklahoma: 0.75% of home value per year. Oklahoma's rate is 0.04 percentage points higher.
Sales tax: Kentucky: 6% combined state and average local rate vs Oklahoma: 9.06%. Oklahoma's combined rate is 3.06 percentage points higher.
Official Websites
Kentucky official website · Oklahoma official website
More Size Comparisons
All Kentucky 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.