| Business | Phone |
| Coteau-Du-Lac Municipalite Ofc 191 338 Rte, Coteau-Du-Lac J0P 1B0 | (450) 763-5822 |
| Club De Tennis Couteau-Lac Inc 4 Principale #C, Coteau-Du-Lac J0P 1B0 | (450) 763-7777 |
| Coteau-Du-Lac Pavillon Wilson 4 Principale #B, Coteau-Du-Lac J0P 1B0 | (450) 763-2377 |
| Coteau-Du-Lac Filtration 234 Ch Du Fleuve, Coteau-Du-Lac J0P 1B0 | (450) 763-0980 |