| Name | Address, Zip |
| Webster 20 20 Incorporated | 513 Main St, 57274-1718 |
| Day County 4-h Jr Leaders | 710 W 12th Ave, 57274-1037 |
| All Around 4-h Club | 43888 147th St, 57274-6025 |
| Webster Alumni Foundation Inc | Po Box 95, 57274-0095 |
| Day County Search And Rescue Inc | 312 W 6th Ave, 57274-1217 |
| Lake Area Hospital | Po Box 489, 57274-0489 |
| Lake Area Hospital Foundation Inc Of Webster South Dakota | Po Box 489, 57274-0489 |
| Webster Area High School Trap Club Inc | 219 E 6th Ave Apt 1, 57274-1466 |
| Webster Area Soccer Association | Po Box 103, 57274-0103 |
| Eden Area Senior Meals Program | 22 W 12th Ave, 57274-1015 |
| Webster Area Pach Program | Po Box 252, 57274-0252 |
| Webster Area Development Corporation Inc | Po Box 6, 57274-0006 |
| Day County Arts Council | Po Box 52, 57274-0052 |
| Enemy Swim Preservation Association | Po Box 557, 57274-0557 |
| Northwest Barrel Racing Association | 43287 146th St, 57274-6051 |
| Bethesda Home Foundation Webster South Dakota Inc | 129 W Highway 12, 57274-1000 |
| Webster Wrestling Booster Club | 13546 436th Ave, 57274-5652 |
| United States Bowling Congress Inc | 612 E 4th St, 57274-1512 |
| Buffalo Plains Historical Foundation Inc | 1109 Main St, 57274-1017 |
| Webster Centennial Committee Inc | Po Box 99, 57274-0099 |
| Webster Youth Center Inc | 513 Main St, 57274-1718 |
| Day County Champion Community | 513 Main St, 57274-1718 |
| Day County Chapter - Iwla | 500 E Highway 12, 57274-1136 |
| Day County Housing Dev Corp | 711 W 1st St Ste 110, 57274-1398 |
| Museum Of Wildlife Science & Industry | 760 W Highway 12, 57274-2212 |
| Operation Muskie | 43623 132nd St, 57274-5208 |
| Webster Paws Walk | 520 W 5th St, 57274-1729 |
| Webster Pta | 102 E 9th Ave, 57274-1407 |
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