| Business | Phone |
| Lake Point Grill 121 Cottage Dr, Buchanan Dam 78609 | (512) 793-2186 |
| Lower Colorado River Authority Black Rock Park, Buchanan Dam 78609 | (512) 793-3138 |
| Lower Colorado River Authority Park Rd 4, Buchanan Dam 78609 | (512) 793-6545 |
| National Gypsum Co Jung Rd, Buchanan Dam 78609 | (512) 793-7232 |
| Oak Hill Technology Inc 2944 Ranch Road 261, Buchanan Dam 78609 | (512) 793-2830 |
| Post Oak Stables 700 Preston Rd, Buchanan Dam 78609 | (512) 793-2828 |
| Tax Firm 104 Logan Dr, Buchanan Dam 78609 | (512) 793-4081 |
| Triple L Enterprises 9975 W Ranch Road 1431, Buchanan Dam 78609 | (512) 793-6512 |
| Smith Welding Hwy 261, Buchanan Dam 78609 | (512) 793-6758 |
| Tallant & Assoc Buchanan Dam 78609 | (512) 793-3914 |
| Branch Banks 231 Wonder World Dr, Buchanan Dam 78609 | (512) 793-2000 |