- Path Welfare Society, Kolkata
- People United for Better Living in Kolkata, Kolkata
- Pharmaceutical Traders Welfare Association of Bengal, Kolkata
- Poritran Seva, Kolkata
- PRAGATI, Kolkata
- Prantakatha, Kolkata
- Praramva Social Welfare Organisation, Kolkata
- Prathibondhee Shangha, Alambazar
- Prativa Social Welfare Society, Kolkata
- PRAYASAM, Kolkata
- PRERAK – Support for Cancer Fighters, Kolkata
- Primary Children Corps, Kolkata
- Progati Foundation, Kolkata
- Protectors of Human Rights, Kolkata
- Pujali Nagarick Chetana, Kolkata
- Pur Babarasat Prerana, Kolkata
- Rabindra Nagar Natyaayudh, Kolkata
- Rajabazar Education & Awareness Development Society, Kolkata
- Rajabazar Guidance Society for Education Consciousness, Kolkata
- Ram Mohan Mission, Kolkata
- Ramakrishna Mission Lokasiksha Parishad, Kolkata
- Ramnagar Lane Forum of Revolution for Communities Education, Kolkata
- Rashwaa Welfare India, Kolkata
- RCDAAMP, Kolkata
- Reach India, Kolkata
- READS – Rajabazar Education & Awareness Development Society, Kolkata
- Relation Welfare Society, Kolkata
- RELATION, Kolkata
- Research and Advocacy Centre for Environment, Kolkata
- Resources Developmnent Foundation, Kolkata
- Revolution- An Essence for Freedom, Kolkata
- Right Track, Kolkata
- RIVER – Revolutionary Ideology of Voluntary Enterprenuers and Realistics, Kolkata
- Rotary Club of Kolkata South Suburban
- Rudragni Creative & Classical Dance Academy, Kolkata
- Rural Aid, Kolkata
- Rural Health Care Foundation, Kolkata
- S.B.Devi Charity Home, Kolkata
- S.M. Educational Society, Kolkata
- Sabuj Sangha, Kolkata
- SACHETNA, Kolkata
- Sadbhavna Trust, Kolkata
- SAHAMARMI, Kolkata
- Sahay Welfare Society for Spastics, Kolkata
- SAHAY, Kolkata
- Sailok Seva Trust, Kolkata
- SAKET, Kolkata
- SAMADARSHI, Kolkata
- Samaritan Help Mission, Kolkata
- Samarpan Basu Memorial Trust, Kolkata
