The map above shows District of Columbia and Ohio side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
District of Columbia vs Ohio Geography
Land area: District of Columbia has a land area of 61 square miles (158 km²), while Ohio has 40,859 square miles (105,824 km²). Ohio's land area is 669.8 times larger than District of Columbia's.
Total area: District of Columbia: 68 square miles (177 km²) vs Ohio: 44,826 square miles (116,098 km²), including inland and coastal water. Ohio's total area is 655.9 times larger than District of Columbia's.
Length: District of Columbia is 13 miles (22 km) long from north to south; Ohio is 291 miles (468 km). Ohio's north-south length is 22.4 times longer than District of Columbia's.
Width: District of Columbia spans 12 miles (19 km) east to west; Ohio spans 317 miles (510 km). Ohio's east-west width is 26.4 times wider than District of Columbia's.
Highest point: District of Columbia's highest point is Fort Reno at 429 feet (131 m); Ohio's is Campbell Hill at 1,547 feet (472 m). Campbell Hill is 1,118 feet higher than Fort Reno.
Lowest point: District of Columbia's lowest point is Potomac River at 0 feet; Ohio's is Ohio River at 455 feet. District of Columbia's lowest point is 455 feet lower.
District of Columbia vs Ohio Population and History
Population: District of Columbia has a population of 702,250 (2024), while Ohio has 11,883,304 (2024). Ohio's population is 16.9 times larger than District of Columbia's.
Population density: District of Columbia: 11,493.5 people per square mile vs Ohio: 290.8. District of Columbia's population density is 39.5 times higher than Ohio's.
Biggest city: District of Columbia's biggest city is Washington with 702,250 people; Ohio's is Columbus with 933,263. Columbus' population is 1.3 times (33%) larger than Washington's.
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 Ohio's Cincinnati, OH-KY-IN metro area (2,302,815). Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's population is 2.8 times (180%) larger than Cincinnati, OH-KY-IN metro area's.
History: District of Columbia: The federal district, established by the Residence Act on July 16, 1790; not a state. Ohio: Admitted to the Union on March 1, 1803, as the 17th state. In its current form, District of Columbia is the older of the two by 13 years.
District of Columbia vs Ohio Economy
GDP: District of Columbia's GDP is $184.3 billion (2024) vs Ohio's $923.1 billion. Ohio's economic output is 5.0 times (401%) larger than District of Columbia's.
GDP per capita: District of Columbia: $262,439 per person vs Ohio: $77,684. District of Columbia's GDP per capita is 3.4 times (238%) higher than Ohio's.
Average income: District of Columbia: $111,185 vs Ohio: $64,464 average income per person (per capita personal income). District of Columbia's average income is 1.7 times (72%) higher than Ohio's.
District of Columbia vs Ohio Counties
Number of counties: District of Columbia has 1 counties, while Ohio has 88. Ohio's county count is 88.0 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; Ohio's is Ashtabula County at 702 square miles. Ashtabula County's land area is 11.5 times larger than District of Columbia's.
Smallest county by area: District of Columbia: District of Columbia (61 sq mi) vs Ohio: Lake County (229 sq mi). Lake County's land area is 3.8 times (275%) larger than District of Columbia's.
Most populous county: District of Columbia: District of Columbia (702,250 people) vs Ohio: Franklin County (1,356,303 people). Franklin County's population is 1.9 times (93%) larger than District of Columbia's.
Least populous county: District of Columbia: District of Columbia (702,250 people) vs Ohio: Vinton County (12,545 people). District of Columbia's population is 56.0 times larger than Vinton County's.
Richest county: District of Columbia: District of Columbia ($111,185 per capita income) vs Ohio: Delaware County ($96,573). District of Columbia's income is 1.2 times (15%) richer than Delaware County's.
Poorest county: District of Columbia: District of Columbia ($111,185 per capita income) vs Ohio: Noble County ($34,940). District of Columbia's income is 3.2 times (218%) richer than Noble County's.
District of Columbia vs Ohio Taxes
State income tax: District of Columbia has a top income tax rate of 10.75%, while Ohio has a top income tax rate of 2.75%. District of Columbia's top rate is 8 percentage points higher.
Property tax: District of Columbia: 0.63% effective rate vs Ohio: 1.22% of home value per year. Ohio's rate is 0.59 percentage points higher.
Sales tax: District of Columbia: 6% combined state and average local rate vs Ohio: 7.29%. Ohio's combined rate is 1.29 percentage points higher.
Official Websites
District of Columbia official website · Ohio official website
More Size Comparisons
All District of Columbia size comparisons · All Ohio 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.