| Business | Phone |
| Beacon Harbor 3861 Willow Rd, Bethel Island 94511 | (925) 684-2174 |
| Bethel Harbor 3405 Harbor Rd, Bethel Island 94511 | (925) 684-2141 |
| Jack Gilbert Marine Svc 3955 Willow Rd, Bethel Island 94511 | (925) 684-3110 |
| Sugar Barge Resort & Marina 4515 Willow Rd, Bethel Island 94511 | (925) 684-8575 |
| Doc's Marina 3212 Dutch Slough Rd, Bethel Island 94511 | (925) 684-3962 |
| Emerald Point Marina 4230 Stone Rd, Bethel Island 94511 | (925) 684-2388 |
| Hennis Marina 3255 Wells Rd, Bethel Island 94511 | (925) 684-3333 |
| New Anchor Marina 1970 Taylor Rd, Bethel Island 94511 | (925) 684-2657 |
| Sunset Harbor 5998 Bethel Island Rd, Bethel Island 94511 | (925) 684-3522 |