Connecticut Counties by Population (2024)

Population

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Hover/click a county for data.
County
2024 Pop.
Change (2020)
Area (mi²)
Density (/mi²)
Location
Capitol Planning Region978,5881.68%396953Capitol Planning Region location
Western CT Planning Region624,9571.07%2051,175Western CT Planning Region location
South Central CT Planning Region567,9140.68%1421,547South Central CT Planning Region location
Naugatuck Valley Planning Region458,6662.09%1591,111Naugatuck Valley Planning Region location
Greater Bridgeport Planning Region328,1771.17%542,344Greater Bridgeport Planning Region location
Southeastern CT Planning Region280,0110.6%231468Southeastern CT Planning Region location
Lower CT River Valley Planning Region176,4481.84%164416Lower CT River Valley Planning Region location
Northwest Hills Planning Region113,6491.29%304144Northwest Hills Planning Region location
Northeastern CT Planning Region97,2362.12%214176Northeastern CT Planning Region location
  1. Connecticut State Data Center - Connecticut’s agency in the Census Bureau’s State Data Center Program
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)

Sources