The map above shows North Dakota and Oklahoma side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
North Dakota vs Oklahoma Geography
Land area: North Dakota has a land area of 68,994 square miles (178,694 km²), while Oklahoma has 68,597 square miles (177,665 km²). North Dakota and Oklahoma have about the same land area.
Total area: North Dakota: 70,699 square miles (183,109 km²) vs Oklahoma: 69,899 square miles (181,038 km²), including inland and coastal water. North Dakota and Oklahoma have about the same total area.
Length: North Dakota is 338 miles (544 km) long from north to south; Oklahoma is 533 miles (857 km). Oklahoma's north-south length is 1.6 times (58%) longer than North Dakota's.
Width: North Dakota spans 408 miles (657 km) east to west; Oklahoma spans 490 miles (789 km). Oklahoma's east-west width is 1.2 times (20%) wider than North Dakota's.
Highest point: North Dakota's highest point is White Butte at 3,500 feet (1,067 m); Oklahoma's is Black Mesa at 4,980 feet (1,518 m). Black Mesa is 1,480 feet higher than White Butte.
Lowest point: North Dakota's lowest point is Red River of the North at 754 feet; Oklahoma's is Little River at 289 feet. Oklahoma's lowest point is 465 feet lower.
North Dakota vs Oklahoma Population and History
Population: North Dakota has a population of 796,568 (2024), while Oklahoma has 4,095,393 (2024). Oklahoma's population is 5.1 times (414%) larger than North Dakota's.
Population density: North Dakota: 11.5 people per square mile vs Oklahoma: 59.7. Oklahoma's population density is 5.2 times (419%) higher than North Dakota's.
Biggest city: North Dakota's biggest city is Fargo with 136,285 people; Oklahoma's is Oklahoma City with 712,919. Oklahoma City's population is 5.2 times (423%) larger than Fargo's.
Largest metro area: North Dakota's largest metropolitan area is Fargo, ND-MN metro area (267,793 people) vs Oklahoma's Oklahoma City, OK metro area (1,497,821). Oklahoma City, OK metro area's population is 5.6 times (459%) larger than Fargo, ND-MN metro area's.
History: North Dakota: Admitted to the Union on November 2, 1889, as the 39th state. Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. In its current form, North Dakota is the older of the two by 18 years.
North Dakota vs Oklahoma Economy
GDP: North Dakota's GDP is $80.1 billion (2024) vs Oklahoma's $263.7 billion. Oklahoma's economic output is 3.3 times (229%) larger than North Dakota's.
GDP per capita: North Dakota: $100,504 per person vs Oklahoma: $64,388. North Dakota's GDP per capita is 1.6 times (56%) higher than Oklahoma's.
Average income: North Dakota: $71,749 vs Oklahoma: $63,708 average income per person (per capita personal income). North Dakota's average income is 1.1 times (13%) higher than Oklahoma's.
North Dakota vs Oklahoma Counties
Number of counties: North Dakota has 53 counties, while Oklahoma has 77. Oklahoma's county count is 1.5 times (45%) higher than North Dakota's.
Biggest county by area: North Dakota's largest county is McKenzie County at 2,760 square miles; Oklahoma's is Osage County at 2,247 square miles. McKenzie County's land area is 1.2 times (23%) larger than Osage County's.
Smallest county by area: North Dakota: Eddy County (630 sq mi) vs Oklahoma: Marshall County (372 sq mi). Eddy County's land area is 1.7 times (70%) larger than Marshall County's.
Most populous county: North Dakota: Cass County (200,945 people) vs Oklahoma: Oklahoma County (816,490 people). Oklahoma County's population is 4.1 times (306%) larger than Cass County's.
Least populous county: North Dakota: Slope County (660 people) vs Oklahoma: Cimarron County (2,133 people). Cimarron County's population is 3.2 times (223%) larger than Slope County's.
Richest county: North Dakota: Dunn County ($99,793 per capita income) vs Oklahoma: Washington County ($126,749). Washington County's income is 1.3 times (27%) richer than Dunn County's.
Poorest county: North Dakota: Sioux County ($33,782 per capita income) vs Oklahoma: Atoka County ($38,709). Atoka County's income is 1.1 times (15%) richer than Sioux County's.
North Dakota vs Oklahoma Taxes
State income tax: North Dakota has a top income tax rate of 2.5%, while Oklahoma has a top income tax rate of 4.5%. Oklahoma's top rate is 2 percentage points higher.
Property tax: North Dakota: 0.96% effective rate vs Oklahoma: 0.75% of home value per year. North Dakota's rate is 0.21 percentage points higher.
Sales tax: North Dakota: 7.09% combined state and average local rate vs Oklahoma: 9.06%. Oklahoma's combined rate is 1.97 percentage points higher.
Official Websites
North Dakota official website · Oklahoma official website
More Size Comparisons
All North Dakota 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.