| Business | Phone |
| Quinnipiack Valley Health Dist 1151 Hartford Tpke, North Haven 6473 | (203) 248-4528 |
| North Haven Cultural Ctr 27 Broadway, North Haven 6473 | (203) 239-7722 |
| North Haven Personnel Dept 18 Church St, North Haven 6473 | (203) 239-5321 |
| North Haven Streets & Roads 110 Elm St, North Haven 6473 | (203) 239-5321 |