| SHOP OWNERS ASSOCIATION | (+30) 22980-54064 |
| PROFESSIONAL FISHERMEN "MIAOULIS" ASSOCIATION | - |
| AMATEUR FISHERMEN ASSOCIATION | - |
| ECOLOGISTS ASSOCIATION "IDRAIKI FOKIA" | (+30) 22980-53449 |
| ATHENS ASSOCIATION "HYDRIAN BROTHERHOOD" | (+30) 6944242292 |
| MARINE SCHOOL ALUMNI ASSOCIATION | - |
| ANIMAL LOVERS ASSOCIATION "ARK OF HYDRA" | - |
| CULTURAL ASSOCIATION OF HYDRA | - |
| MUSICAL ASSOCIATION OF HYDRA | - |
| HUNTING ASSOCIATION OF HYDRA | - |
| ATHLETIC ASSOCIATION "GROTHIA IDRAS" | (+30) 6974709544 |
| CHESS ASSOCIATION OF HYDRA | (+30) 22980-53720 |
| NAUTICAL CLUB OF HYDRA | (+30) 22980-53800 |
| AMATEUR NAUTICAL CLUB OF WATER POLO | (+30) 22980-52904 |
