What are the Borough, Connecticut Zip Codes for 2020, 2019Primary Zip Codes for BoroughZip CodePrimary CitySecondary City06340GrotonBorough, Noank, Poquonock Bridge, Center Groton, Groton Long Point, Jupiter PointCities sharing Zip Codes with BoroughZip CodePrimary CitySecondary CityMore Information06340GrotonBorough06340GrotonCenter Groton06340GrotonGroton Long Point06340GrotonJupiter Point06340GrotonNoank Noank population stats 06340GrotonPoquonock Bridge Poquonock Bridge population stats Advertisements