The map above shows Connecticut and Idaho side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Connecticut vs Idaho Geography
Land area
- Connecticut has a land area of 4,843 square miles (12,542 km²), while Idaho has 82,645 square miles (214,051 km²).
- Idaho's land area is 17.1 times larger than Connecticut's.
Total area
- Connecticut: 5,544 square miles (14,358 km²) vs Idaho: 83,569 square miles (216,441 km²), including inland and coastal water.
- Idaho's total area is 15.1 times larger than Connecticut's.
Length
- Connecticut is 73 miles (118 km) long from north to south; Idaho is 483 miles (778 km).
- Idaho's north-south length is 6.6 times (562%) longer than Connecticut's.
Width
- Connecticut spans 104 miles (167 km) east to west; Idaho spans 352 miles (566 km).
- Idaho's east-west width is 3.4 times (238%) wider than Connecticut's.
Highest point
- Connecticut's highest point is Mount Frissell (south slope) at 2,376 feet (724 m); Idaho's is Borah Peak at 12,631 feet (3,850 m).
- Borah Peak is 10,255 feet higher than Mount Frissell (south slope).
Lowest point
- Connecticut's lowest point is Long Island Sound at 0 feet; Idaho's is Snake River at 718 feet.
- Connecticut's lowest point is 718 feet lower.
Connecticut vs Idaho Population and History
Population
- Connecticut has a population of 3,675,069 (2024), while Idaho has 2,001,619 (2024).
- Connecticut's population is 1.8 times (84%) larger than Idaho's.
Population density
- Connecticut: 758.9 people per square mile vs Idaho: 24.2.
- Connecticut's population density is 31.4 times higher than Idaho's.
Biggest city
- Connecticut's biggest city is Bridgeport with 151,599 people; Idaho's is Boise with 237,963.
- Boise's population is 1.6 times (57%) 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 Idaho's Boise City, ID metro area (845,877).
- Hartford-West Hartford-East Hartford, CT metro area's population is 1.4 times (38%) larger than Boise City, ID metro area's.
History
- Connecticut: Admitted to the Union on January 9, 1788, as the 5th state.
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd state.
- In its current form, Connecticut is the older of the two by 102 years.
Connecticut vs Idaho Economy
GDP
- Connecticut's GDP is $356.8 billion (2024) vs Idaho's $129.0 billion.
- Connecticut's economic output is 2.8 times (177%) larger than Idaho's.
GDP per capita
- Connecticut: $97,096 per person vs Idaho: $64,457.
- Connecticut's GDP per capita is 1.5 times (51%) higher than Idaho's.
Average income
- Connecticut: $95,067 vs Idaho: $62,323 average income per person (per capita personal income).
- Connecticut's average income is 1.5 times (53%) higher than Idaho's.
Connecticut vs Idaho Counties
Number of counties
- Connecticut has 9 counties, while Idaho has 44.
- Idaho's county count is 4.9 times (389%) higher than Connecticut's.
Biggest county by area
- Connecticut's largest county is Capitol Planning Region at 1,027 square miles; Idaho's is Idaho County at 8,478 square miles.
- Idaho County's land area is 8.3 times (725%) larger than Capitol Planning Region's.
Smallest county by area
- Connecticut: Greater Bridgeport Planning Region (140 sq mi) vs Idaho: Payette County (407 sq mi).
- Payette County's land area is 2.9 times (190%) larger than Greater Bridgeport Planning Region's.
Most populous county
- Connecticut: Capitol Planning Region (991,508 people) vs Idaho: Ada County (535,799 people).
- Capitol Planning Region's population is 1.9 times (85%) larger than Ada County's.
Least populous county
- Connecticut: Northeastern Connecticut Planning Region (97,701 people) vs Idaho: Clark County (794 people).
- Northeastern Connecticut Planning Region's population is 123.0 times larger than Clark County's.
Richest county
- Connecticut: Western Connecticut Planning Region ($165,513 per capita income) vs Idaho: Blaine County ($202,612).
- Blaine County's income is 1.2 times (22%) richer than Western Connecticut Planning Region's.
Poorest county
- Connecticut: Southeastern Connecticut Planning Region ($64,845 per capita income) vs Idaho: Madison County ($29,485).
- Southeastern Connecticut Planning Region's income is 2.2 times (120%) richer than Madison County's.
Connecticut vs Idaho Taxes
State income tax
- Connecticut has a top income tax rate of 6.99%, while Idaho has a top income tax rate of 5.3%.
- Connecticut's top rate is 1.69 percentage points higher.
Property tax
- Connecticut: 1.66% effective rate vs Idaho: 0.43% of home value per year.
- Connecticut's rate is 1.23 percentage points higher.
Sales tax
- Connecticut: 6.35% combined state and average local rate vs Idaho: 6.03%.
- Connecticut's combined rate is 0.32 percentage points higher.
Official Websites
Connecticut official website · Idaho official website
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More Size Comparisons
All Connecticut size comparisons · All Idaho 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.