| | 0913040710 | Killingworth town | Lower Connecticut River
Valley Planning Region | CT | Active government
providing primary
general-purpose functions A |
| | 0913044210 | Lyme town | Lower Connecticut River
Valley Planning Region | CT | Active government
providing primary
general-purpose functions A |
| | 0913047080 | Middlefield town | Lower Connecticut River
Valley Planning Region | CT | Active government
providing primary
general-purpose functions A |
| | 0913047360 | Middletown town | Lower Connecticut River
Valley Planning Region | CT | Active government
consolidated with another
government with a single
set of officials C |
| | 0913057040 | Old Lyme town | Lower Connecticut River
Valley Planning Region | CT | Active government
providing primary
general-purpose functions A |
| | 0913057320 | Old Saybrook town | Lower Connecticut River
Valley Planning Region | CT | Active government
providing primary
general-purpose functions A |
| | 0913061800 | Portland town | Lower Connecticut River
Valley Planning Region | CT | Active government
providing primary
general-purpose functions A |
| | 0913081680 | Westbrook town | Lower Connecticut River
Valley Planning Region | CT | Active government
providing primary
general-purpose functions A |