The map above shows Connecticut and District of Columbia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Connecticut vs District of Columbia Geography
Land area: Connecticut has a land area of 4,843 square miles (12,542 km²), while District of Columbia has 61 square miles (158 km²). Connecticut's land area is 79.4 times larger than District of Columbia's.
Total area: Connecticut: 5,544 square miles (14,358 km²) vs District of Columbia: 68 square miles (177 km²), including inland and coastal water. Connecticut's total area is 81.1 times larger than District of Columbia's.
Length: Connecticut is 73 miles (118 km) long from north to south; District of Columbia is 13 miles (22 km). Connecticut's north-south length is 5.6 times (462%) longer than District of Columbia's.
Width: Connecticut spans 104 miles (167 km) east to west; District of Columbia spans 12 miles (19 km). Connecticut's east-west width is 8.7 times (767%) wider than District of Columbia's.
Highest point: Connecticut's highest point is Mount Frissell (south slope) at 2,376 feet (724 m); District of Columbia's is Fort Reno at 429 feet (131 m). Mount Frissell (south slope) is 1,947 feet higher than Fort Reno.
Lowest point: Connecticut's lowest point is Long Island Sound at 0 feet; District of Columbia's is Potomac River at 0 feet. Both lowest points are at or near sea level.
Connecticut vs District of Columbia Population and History
Population: Connecticut has a population of 3,675,069 (2024), while District of Columbia has 702,250 (2024). Connecticut's population is 5.2 times (423%) larger than District of Columbia's.
Population density: Connecticut: 758.9 people per square mile vs District of Columbia: 11,493.5. District of Columbia's population density is 15.1 times higher than Connecticut's.
Biggest city: Connecticut's biggest city is Bridgeport with 151,599 people; District of Columbia's is Washington with 702,250. Washington's population is 4.6 times (363%) larger than Bridgeport's.
Largest metro area: Connecticut's largest metropolitan area is Hartford-West Hartford-East Hartford, CT metro area (1,169,048 people) vs District of Columbia's Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489). Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's population is 5.5 times (451%) larger than Hartford-West Hartford-East Hartford, CT metro area's.
History: Connecticut: Admitted to the Union on January 9, 1788, as the 5th state. District of Columbia: The federal district, established by the Residence Act on July 16, 1790; not a state. In its current form, Connecticut is the older of the two by 2 years.
Connecticut vs District of Columbia Economy
GDP: Connecticut's GDP is $356.8 billion (2024) vs District of Columbia's $184.3 billion. Connecticut's economic output is 1.9 times (94%) larger than District of Columbia's.
GDP per capita: Connecticut: $97,096 per person vs District of Columbia: $262,439. District of Columbia's GDP per capita is 2.7 times (170%) higher than Connecticut's.
Average income: Connecticut: $95,067 vs District of Columbia: $111,185 average income per person (per capita personal income). District of Columbia's average income is 1.2 times (17%) higher than Connecticut's.
Connecticut vs District of Columbia Counties
Number of counties: Connecticut has 9 counties, while District of Columbia has 1. Connecticut's county count is 9.0 times (800%) higher than District of Columbia's.
Biggest county by area: Connecticut's largest county is Capitol Planning Region at 1,027 square miles; District of Columbia's is District of Columbia at 61 square miles. Capitol Planning Region's land area is 16.8 times larger than District of Columbia's.
Smallest county by area: Connecticut: Greater Bridgeport Planning Region (140 sq mi) vs District of Columbia: District of Columbia (61 sq mi). Greater Bridgeport Planning Region's land area is 2.3 times (129%) larger than District of Columbia's.
Most populous county: Connecticut: Capitol Planning Region (991,508 people) vs District of Columbia: District of Columbia (702,250 people). Capitol Planning Region's population is 1.4 times (41%) larger than District of Columbia's.
Least populous county: Connecticut: Northeastern Connecticut Planning Region (97,701 people) vs District of Columbia: District of Columbia (702,250 people). District of Columbia's population is 7.2 times (619%) larger than Northeastern Connecticut Planning Region's.
Richest county: Connecticut: Western Connecticut Planning Region ($165,513 per capita income) vs District of Columbia: District of Columbia ($111,185). Western Connecticut Planning Region's income is 1.5 times (49%) richer than District of Columbia's.
Poorest county: Connecticut: Southeastern Connecticut Planning Region ($64,845 per capita income) vs District of Columbia: District of Columbia ($111,185). District of Columbia's income is 1.7 times (71%) richer than Southeastern Connecticut Planning Region's.
Connecticut vs District of Columbia Taxes
State income tax: Connecticut has a top income tax rate of 6.99%, while District of Columbia has a top income tax rate of 10.75%. District of Columbia's top rate is 3.76 percentage points higher.
Property tax: Connecticut: 1.66% effective rate vs District of Columbia: 0.63% of home value per year. Connecticut's rate is 1.03 percentage points higher.
Sales tax: Connecticut: 6.35% combined state and average local rate vs District of Columbia: 6%. Connecticut's combined rate is 0.35 percentage points higher.
Official Websites
Connecticut official website · District of Columbia official website
More Size Comparisons
All Connecticut size comparisons · All District of Columbia 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.