Connecticut: elevation, cities and highest point
Connecticut has 3,688,496 people (2025) and 9 planning regions. Its highest point is the south slope of Mount Frissell, at 2,380 ft, and its lowest, the Long Island Sound, at sea level. Here you’ll find the elevation of its capital and its cities over 100,000 people, with a map of its planning regions.
By the All Map Tools Team
- Population (2025)
- 3,688,496
- The 29th most populous of the 50 states
- Land area
- 4,842 sq mi
- The 48th largest state
- Planning regions
- 9
- According to the Census (2025)
- Highest point
- 2,380 ft
- the south slope of Mount Frissell · the 36th highest of the 50 state high points
- Lowest point
- Sea level
- Long Island Sound
Map of Connecticut’s planning regions
- Capital’s planning region
- Planning region with a city page
- City, by elevation
- Highest point
Elevation
The capital, Hartford, sits at 50 ft (15 m): the 42nd highest of the 50 state capitals. Connecticut’s highest point, the south slope of Mount Frissell, is 2,330 ft higher.
The USGS table gives its highest point, the south slope of Mount Frissell, 2,380 ft. It has no page of its own because the official gazetteer (GNIS) has no point for it: it’s on the slope of Mount Frissell, whose summit is in Massachusetts.
Connecticut has 5 cities with a page. The highest is Waterbury, at 271 ft, and the lowest is Stamford, at 16 ft: 255 ft apart.
Connecticut borders 3 states. Their highest points are Jerimoth Hill, in Rhode Island (812 ft), Mount Marcy, in New York (5,344 ft), and Mount Greylock, in Massachusetts (3,491 ft): Connecticut’s is the 3rd highest of the 4. Their capitals: Providence (9 ft), Albany (143 ft), and Boston (48 ft).
- Hartford 50 ft
Cities of 100,000 to 250,000 people (4)
Population
Connecticut had 3,688,496 residents on July 1, 2025, according to Census Bureau estimates, 2.2% more than in April 2020 (3,607,750). Across 4,842 sq mi of land, that’s 762 people/sq mi.
Its most populous place is Bridgeport, with 152,273 people. The Census counts 215 cities, towns and census-designated places (CDPs) in Connecticut.
| Place | Population | Land area | Elevation |
|---|---|---|---|
| Bridgeport | 152,273 | 16.1 sq mi | 19 ft |
| Stamford | 139,535 | 37.6 sq mi | 16 ft |
| New Haven | 138,774 | 18.7 sq mi | 39 ft |
| Hartford | 121,981 | 17.4 sq mi | 50 ft |
| Waterbury | 115,771 | 28.6 sq mi | 271 ft |
| Norwalk | 94,508 | 22.9 sq mi | — |
| Danbury | 89,033 | 42.0 sq mi | — |
| New Britain | 76,286 | 13.4 sq mi | — |
| West Hartford | 63,620 | 21.8 sq mi | — |
| Bristol | 62,341 | 26.4 sq mi | — |
Neighboring states
Tools
Frequently asked questions
What is the highest point in Connecticut?
South slope of Mount Frissell, at 2,380 ft, according to the USGS table. It’s the 36th highest of the 50 state high points.
What is the lowest point in Connecticut?
The Long Island Sound, at sea level, according to the same USGS table.
What is the elevation of Hartford, the capital?
50 ft above sea level, at its reference point in the USGS gazetteer. It’s the 42nd highest state capital.
What is the highest city in Connecticut?
Of the cities with a page (the capital and those over 100,000 people), Waterbury, at 271 ft. Some smaller towns are higher: look them up with the point elevation tool.
How many planning regions does Connecticut have?
9, according to the Census Bureau in 2025.
Sources
- Population, land area and counties: U.S. Census Bureau (Vintage 2025 estimates and 2025 Gazetteer), public domain.
- Highest and lowest points: USGS, “Elevations and Distances in the United States” (and, for Denali, the 2015 survey), public domain.
- City elevations: USGS 3DEP at each city’s GNIS point, public domain.
- County map: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
Methodology and sources · Spotted a mistake? Let us know