The map above shows District of Columbia and Oklahoma side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
District of Columbia vs Oklahoma Geography
Land area: District of Columbia has a land area of 61 square miles (158 km²), while Oklahoma has 68,597 square miles (177,665 km²). Oklahoma's land area is 1,124.5 times larger than District of Columbia's.
Total area: District of Columbia: 68 square miles (177 km²) vs Oklahoma: 69,899 square miles (181,038 km²), including inland and coastal water. Oklahoma's total area is 1,022.8 times larger than District of Columbia's.
Length: District of Columbia is 13 miles (22 km) long from north to south; Oklahoma is 533 miles (857 km). Oklahoma's north-south length is 41.0 times longer than District of Columbia's.
Width: District of Columbia spans 12 miles (19 km) east to west; Oklahoma spans 490 miles (789 km). Oklahoma's east-west width is 40.8 times wider than District of Columbia's.
Highest point: District of Columbia's highest point is Fort Reno at 429 feet (131 m); Oklahoma's is Black Mesa at 4,980 feet (1,518 m). Black Mesa is 4,551 feet higher than Fort Reno.
Lowest point: District of Columbia's lowest point is Potomac River at 0 feet; Oklahoma's is Little River at 289 feet. District of Columbia's lowest point is 289 feet lower.
District of Columbia vs Oklahoma Population and History
Population: District of Columbia has a population of 702,250 (2024), while Oklahoma has 4,095,393 (2024). Oklahoma's population is 5.8 times (483%) larger than District of Columbia's.
Population density: District of Columbia: 11,493.5 people per square mile vs Oklahoma: 59.7. District of Columbia's population density is 192.5 times higher than Oklahoma's.
Biggest city: District of Columbia's biggest city is Washington with 702,250 people; Oklahoma's is Oklahoma City with 712,919. Washington and Oklahoma City have about the same population.
Largest metro area: District of Columbia's largest metropolitan area is Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489 people) vs Oklahoma's Oklahoma City, OK metro area (1,497,821). Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's population is 4.3 times (330%) larger than Oklahoma City, OK metro area's.
History: District of Columbia: The federal district, established by the Residence Act on July 16, 1790; not a state. Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. In its current form, District of Columbia is the older of the two by 117 years.
District of Columbia vs Oklahoma Economy
GDP: District of Columbia's GDP is $184.3 billion (2024) vs Oklahoma's $263.7 billion. Oklahoma's economic output is 1.4 times (43%) larger than District of Columbia's.
GDP per capita: District of Columbia: $262,439 per person vs Oklahoma: $64,388. District of Columbia's GDP per capita is 4.1 times (308%) higher than Oklahoma's.
Average income: District of Columbia: $111,185 vs Oklahoma: $63,708 average income per person (per capita personal income). District of Columbia's average income is 1.7 times (75%) higher than Oklahoma's.
District of Columbia vs Oklahoma Counties
Number of counties: District of Columbia has 1 counties, while Oklahoma has 77. Oklahoma's county count is 77.0 times higher than District of Columbia's.
Biggest county by area: District of Columbia's largest county is District of Columbia at 61 square miles; Oklahoma's is Osage County at 2,247 square miles. Osage County's land area is 36.8 times larger than District of Columbia's.
Smallest county by area: District of Columbia: District of Columbia (61 sq mi) vs Oklahoma: Marshall County (372 sq mi). Marshall County's land area is 6.1 times (508%) larger than District of Columbia's.
Most populous county: District of Columbia: District of Columbia (702,250 people) vs Oklahoma: Oklahoma County (816,490 people). Oklahoma County's population is 1.2 times (16%) larger than District of Columbia's.
Least populous county: District of Columbia: District of Columbia (702,250 people) vs Oklahoma: Cimarron County (2,133 people). District of Columbia's population is 329.2 times larger than Cimarron County's.
Richest county: District of Columbia: District of Columbia ($111,185 per capita income) vs Oklahoma: Washington County ($126,749). Washington County's income is 1.1 times (14%) richer than District of Columbia's.
Poorest county: District of Columbia: District of Columbia ($111,185 per capita income) vs Oklahoma: Atoka County ($38,709). District of Columbia's income is 2.9 times (187%) richer than Atoka County's.
District of Columbia vs Oklahoma Taxes
State income tax: District of Columbia has a top income tax rate of 10.75%, while Oklahoma has a top income tax rate of 4.5%. District of Columbia's top rate is 6.25 percentage points higher.
Property tax: District of Columbia: 0.63% effective rate vs Oklahoma: 0.75% of home value per year. Oklahoma's rate is 0.12 percentage points higher.
Sales tax: District of Columbia: 6% combined state and average local rate vs Oklahoma: 9.06%. Oklahoma's combined rate is 3.06 percentage points higher.
Official Websites
District of Columbia official website · Oklahoma official website
More Size Comparisons
All District of Columbia 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.