Bordering states
Connecticut vs Massachusetts
Short answer
- CT
- 3,675,069
- MA
- 7,136,171
The two states, county by county
Both maps share one density scale, so the same shade means the same number of people per square mile on either side of the border. Darker counties are denser. Select a county to open its page.
Connecticut
Massachusetts
- < 204
- < 472
- < 965
- < 1,570
- ≥ 1,570
Residents, 2024
- 01Connecticut3,675,069
- 02Massachusetts7,136,171
Land, square miles
- 01Connecticut4,842
- 02Massachusetts7,801
People per square mile
- 01Connecticut758.9
- 02Massachusetts914.8
Median county household income
- 01Connecticut$90,965
- 02Massachusetts$92,474
Side by side
| Measure | Connecticut | Massachusetts |
|---|---|---|
| Residents, 2024 | 3,675,069 | 7,136,171 |
| Rank by population | 29th | 16th |
| Land, sq mi | 4,842 | 7,801 |
| People per sq mi | 758.9 | 914.8 |
| County-equivalents | 9 | 14 |
| Median county residents | 335,666 | 503,121 |
| Median county income | $90,965 | $92,474 |
| Most populous county | Capitol Planning Region | Middlesex County |
| Largest county by land | Capitol Planning Region | Worcester County |
| Capital | Hartford | Boston |
| Daylight at capital, June 21 | 15 h 13 min | 15 h 17 min |
| Census division | New England | New England |
Population and density
Massachusetts has 7,136,171 residents, 94% more than Connecticut's 3,675,069. Connecticut ranks 29th and Massachusetts 16th of the 50 states and DC. Massachusetts is the more crowded, with 914.8 people per square mile against 758.9, 21% more.
Land area
Massachusetts has 7,801 square miles of land, 61% more than Connecticut's 4,842. The largest county-equivalent in Connecticut is Capitol Planning Region at 1,027 square miles; in Massachusetts it is Worcester County at 1,511.
Counties
Massachusetts is divided into 14 county-equivalents and Connecticut into 9, so an average Massachusetts county covers 557 square miles against 538. The typical county in Connecticut has 335,666 residents, against 503,121 in Massachusetts. The most populous are Capitol Planning Region (991,508) and Middlesex County (1,668,956).
No county name appears in both states, so a county name alone is enough to tell which state a row belongs to.
Household income
The typical county household income is about the same in both: $90,965 in Connecticut and $92,474 in Massachusetts. The highest county incomes are Western Connecticut Planning Region ($121,285) in Connecticut and Norfolk County ($123,449) in Massachusetts, from SAIPE 2023.
Capitals and daylight
Hartford and Boston are 93 miles apart in a straight line; from Hartford the initial bearing is 63°, ENE. On June 21, 2026, Hartford gets 15 h 13 min of daylight and Boston 15 h 17 min; on December 21 the figures are 9 h 08 min and 9 h 05 min. Month by month tables are on the Hartford and Boston daylight pages.
Where they sit
Both are in the Census New England division of the Northeast region. By county internal points, Connecticut spans 2 UTM zones and Massachusetts 2.
Questions people ask
Which is bigger, Connecticut or Massachusetts?
Massachusetts, with 7,801 square miles of land against 4,842, 1.61 times as large.
Which has more people, Connecticut or Massachusetts?
Massachusetts has 7,136,171 residents, 94% more than Connecticut's 3,675,069.
How far is Hartford from Boston?
93 miles in a straight line, heading ENE (63°) from Hartford.
Do Connecticut and Massachusetts have counties with the same name?
No. None of their county-level units share a name.
Sources and data as of
Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.
- 01Census Vintage 2024 county population estimates
- 02Census 2024 Gazetteer, counties
- 03Census SAIPE 2023 state and county estimates
- 04Census Bureau regions and divisions of the United States (last verified 2026-09-30)
How every number is computed: methodology. Spotted a wrong figure? Report an error.