| Miscellaneous | Radio 3ZZZ - Sinhalese Group | Pathum Thilakasiri | P. O. Box 17, Preston 3072 | 041 327 3943 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Past Pupils | Richmond & Mahinda College Old Boys Association | Ranjith Gunawardena | 615, Pacoe Vale Road, Oak Park 3946 | (03) 9306 6874 | N/A |
| Religious | Ringwood Buddhist Meditation Centre | N/A | 1, Evelyn Road, Ringwood 3134 | (03) 9876 0036 | N/A |
| Religious | Ringwood Buddhist Meditation Group | B. Herlihy | P. O. Box 578, Heidelberg 3084 | (03) 9758 2016 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Sports | Rowville Cricket Club | Rex Foulstone | 19, Taylors Place, Rowville 3178 | (03) 9763 4310 | N/A |
| Past Pupils | Royal College Old Boys in Australia Association Inc | Rohan Wimalasuriya | P. O. Box 796, Mount Waverley 3149 | 0429 309 208 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Past Pupils | S. Thomas' College Old Boys Association (Australia Branch) Inc | Mark Nanayakkara | P.O.Box 2337, Mount Waverley 3149 | 0408 990 146 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Past Pupils | S. Thomas' College Old Boys Association of NSW Inc | Lasantha Peris | 4, Audine Avenue, Epping 2121 | N/A | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Past Pupils | S. Thomas' College, Kotte, Old Boys Association | Eustace Senn | 7, Carpenter Street, Noble Park 3174 | (03) 9547 5924 | N/A |
| Religious | Saiva Maha Sabai (WA) Inc | Aran Kandiah | P. O. Box 37, Applecross 6953 | N/A | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Miscellaneous | Samanala Art Group | Ms Winsome Koch | 76, Camelot Drive, Glen Waverley 3150 | (03) 9233 5063 | N/A |
| Miscellaneous | Sannasa Community Magazine | Asoka Subasinghe | 61, Nettle Drive, Hallam 3803 | (03) 9796 4241 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Miscellaneous | SBS Radio - Ethnic Radio - Tamil Language Program | N/A | Level 4, 2 Kavanagh Street, South Melbourne 3205 | (03) 9612 2525 | N/A |
| Miscellaneous | SCATS | Tissa Amarasekera | GPO Box 4229 NN, Melbourne 3001 | (03) 9337 9468 | N/A |
| Miscellaneous | SCATS NSW Inc | Upasiri de Silva | P. O. Box 473, St Marys 1790 | (02) 9833 7616 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Social | Serendib | Shamini Mendis | N/A | 0412 653 076 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Miscellaneous | Serendib News | Virosh Perera | N/A | 1300 885 690 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Sports | Shamrocks Sports Club | Lennie Senn | 4, Juniper Court, Keysborough 3173 | (03) 9798 8091 | N/A |
| Political | Sihala Uramaya (Sinhala Heritage) | Rohana Arambewala | P. O. Box 131, Kingsbury 3083 | (03) 9462 6492 | N/A |
| Miscellaneous | Sihanadha Community Magazine | Wilfred P. Siriwardana | P. O. Box 591, Cragieburn 3064 | 0409 359 389 | This email address is being protected from spambots. You need JavaScript enabled to view it. |
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