- 24 Parganas Practitioners Association of Alternative Medicine, Kolkata
- A Hand, Kolkata
- Abacus Welfare Society, Kolkata
- ABAYAB 2005, Kolkata
- Abha, Kolkata
- Abhaash Dakshin, Kolkata
- ABLE Foundation, Kolkata
- Ace Social Foundation, Kolkata
- AESTHETICS, Kolkata
- AFT – Amanat Foundation Trust, Kolkata
- AGNI – A Dream for Great Nation India, Kolkata
- Ahimsaa Research Foundation, Kolkata
- AHVAN, Kolkata
- Aim India Foundation, Kolkata
- Al Ameen Association for Distressed People, Kolkata
- Albatross Foundation, Kolkata
- All Backward Class Relief & Development Mission, Kolkata
- All Bengal Mass Education & Development Association, Kolkata
- All Bengal Renal Failure & Transplant Welfare Association, Kolkata
- All Bengal Women’s Union, Kolkata
- All Federation for Human & Democratic Protection, Kolkata
- All India Council for Mass Education & Development, Kolkata
- All India Crime & Investigative Journalists Association, Kolkata
- All India Women’s Conference, East Kolkata Constituency, Kolkata
- All India Women’s Conference, Kolkata
- Amarpally Nabo Disha Society, Kolkata
- An Association for Social Welfare, Kolkata
- Ananda Marga Universal Relief Team, Kolkata
- Ananda Samiti, Kolkata
- Ananyaa Societies, Kolkata
- Anisha Counselling Centre, Kolkata
- Ankur Kala, Kolkata
- Annabhau Sathe Foundation, Kolkata
- ANNAYATA, Kolkata
- Anudip Foundation for Social Welfare, Kolkata
- Anuprerona Welfare Society, Kolkata
- APAN – Association for Poverty Alleviation Network, Kolkata
- APIL – Association for Peoples Initiatives for Liberation, Kolkata
- APMG – Academy of Pharmacy Management & Guidance, Kolkata
- Aranyaj Society for Educational & Environmental Development, Kolkata
- Aries Probono Publico Society, Kolkata
- Arogya Sandhan Santoshpur, Kolkata
- Art Trust, Kolkata
- Arunachal Greenhand, Kolkata
- ASHRAY, Kolkata
- Ashutosh Institution, Kolkata
- Association for Poverty Alleviation Network, Kolkata
- Association for Social Health in India, Kolkata
- Association of Relief & Community Aid, Kolkata
- ASTHA, Kolkata
