Population of Killingworth, Connecticut as of November 2025. How many people live in Killingworth today?

The exact population of Killingworth, Connecticut as of November 2025 is estimated at 6,174 residents. Please note: this figure is an estimate and may slightly change as people get born and pass away, it also depends on migration to/from Killingworth.

Check out more data on population in Connecticut:

• Population of Danbury
• Population of Greenwich
• Population of Stratford
• Population of Wallingford
• Population of Groton
• Population of Newington
• Population of Branford
• Population of Wethersfield
• Population of Simsbury
• Population of Darien
• Population of Berlin
• Population of Waterford
• Population of Montville
• Population of Plainville
• Population of Tolland
• Population of North Branford
• Population of Windsor Locks