The map above shows District of Columbia and Montana side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
District of Columbia vs Montana Geography
Land area: District of Columbia has a land area of 61 square miles (158 km²), while Montana has 145,550 square miles (376,973 km²). Montana's land area is 2,385.9 times larger than District of Columbia's.
Total area: District of Columbia: 68 square miles (177 km²) vs Montana: 147,043 square miles (380,840 km²), including inland and coastal water. Montana's total area is 2,151.6 times larger than District of Columbia's.
Length: District of Columbia is 13 miles (22 km) long from north to south; Montana is 319 miles (514 km). Montana's north-south length is 24.5 times longer than District of Columbia's.
Width: District of Columbia spans 12 miles (19 km) east to west; Montana spans 607 miles (976 km). Montana's east-west width is 50.6 times wider than District of Columbia's.
Highest point: District of Columbia's highest point is Fort Reno at 429 feet (131 m); Montana's is Granite Peak at 12,767 feet (3,891 m). Granite Peak is 12,338 feet higher than Fort Reno.
Lowest point: District of Columbia's lowest point is Potomac River at 0 feet; Montana's is Kootenai River at 1,805 feet. District of Columbia's lowest point is 1,805 feet lower.
District of Columbia vs Montana Population and History
Population: District of Columbia has a population of 702,250 (2024), while Montana has 1,137,233 (2024). Montana's population is 1.6 times (62%) larger than District of Columbia's.
Population density: District of Columbia: 11,493.5 people per square mile vs Montana: 7.8. District of Columbia's population density is 1,473.5 times higher than Montana's.
Biggest city: District of Columbia's biggest city is Washington with 702,250 people; Montana's is Billings with 121,483. Washington's population is 5.8 times (478%) larger than Billings'.
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 Montana's Billings, MT metro area (192,531). Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's population is 33.4 times larger than Billings, MT metro area's.
History: District of Columbia: The federal district, established by the Residence Act on July 16, 1790; not a state. Montana: Admitted to the Union on November 8, 1889, as the 41st state. In its current form, District of Columbia is the older of the two by 99 years.
District of Columbia vs Montana Economy
GDP: District of Columbia's GDP is $184.3 billion (2024) vs Montana's $78.4 billion. District of Columbia's economic output is 2.4 times (135%) larger than Montana's.
GDP per capita: District of Columbia: $262,439 per person vs Montana: $68,975. District of Columbia's GDP per capita is 3.8 times (280%) higher than Montana's.
Average income: District of Columbia: $111,185 vs Montana: $69,240 average income per person (per capita personal income). District of Columbia's average income is 1.6 times (61%) higher than Montana's.
District of Columbia vs Montana Counties
Number of counties: District of Columbia has 1 counties, while Montana has 56. Montana's county count is 56.0 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; Montana's is Beaverhead County at 5,543 square miles. Beaverhead County's land area is 90.7 times larger than District of Columbia's.
Smallest county by area: District of Columbia: District of Columbia (61 sq mi) vs Montana: Silver Bow County (718 sq mi). Silver Bow County's land area is 11.8 times larger than District of Columbia's.
Most populous county: District of Columbia: District of Columbia (702,250 people) vs Montana: Yellowstone County (171,583 people). District of Columbia's population is 4.1 times (309%) larger than Yellowstone County's.
Least populous county: District of Columbia: District of Columbia (702,250 people) vs Montana: Petroleum County (525 people). District of Columbia's population is 1,337.6 times larger than Petroleum County's.
Richest county: District of Columbia: District of Columbia ($111,185 per capita income) vs Montana: Gallatin County ($94,573). District of Columbia's income is 1.2 times (18%) richer than Gallatin County's.
Poorest county: District of Columbia: District of Columbia ($111,185 per capita income) vs Montana: Blaine County ($37,554). District of Columbia's income is 3.0 times (196%) richer than Blaine County's.
District of Columbia vs Montana Taxes
State income tax: District of Columbia has a top income tax rate of 10.75%, while Montana has a top income tax rate of 5.65%. District of Columbia's top rate is 5.1 percentage points higher.
Property tax: District of Columbia: 0.63% effective rate vs Montana: 0.69% of home value per year. Montana's rate is 0.06 percentage points higher.
Sales tax: District of Columbia: 6% combined state and average local rate vs Montana: 0%. District of Columbia's combined rate is 6 percentage points higher.
Official Websites
District of Columbia official website · Montana official website
More Size Comparisons
All District of Columbia size comparisons · All Montana 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.