- International Institute for Sustainable Future, Mumbai
- International Labour Organisation, New Delhi
- International Leprosy Union – Health Alliance, Pune
- International Leprosy Unit, Pune
- International Longevity Centre India, Pune
- International Management Centre, Kolkata
- International Mass Awareness Programme, Kolkata
- International Mission Of Dr. Ambeadkar Edcation Socitay, Nagpur
- International Monetary Fund, New Delhi
- International Resources for Fairer Trade, Mumbai
- International Rural Educational & Cultural Association, New Delhi
- International Sikh Martial Art Acacdemy, Chandigarh
- International Social Affairs Council, Davanagere
- International Social Welfare Organisation, Dhenkanal
- International Social Workers Association, Lucknow
- International Social Workers Society, Jaipur
- International Trade Development Centre, New Delhi
- International Urban Rural Development Foundation, Gandhinagar
- International Volunteers Trust, Bangalore
- Interserve (India), New Delhi
- Intigretd Rural Developent Society, Kurnool
- Inventor & Followers of Truth, Bareilly
- Investment in Man Trust, Pune
- Ipex Sindhi Welfare Association, Delhi
- Ipsha Samaj Kalyan Kendra, Patna
- Iqbal Narain Srivastava Memorial Society, Lucknow
- Iqra Gyan Educational & Welfare Foundation, Mumbai
- Iqura Minorety Multipurpous Society, Latur
- IRADA, Nagpur
- IRADA, Sangli
- Iraiva Foundation, Dindigul
- IRDC – Baby Sarah’s Home, Pondicherry
- IRDERH – Institute for Research Development in Environment & Rural Health, Ahmednagar
- IRDF, Bhubaneswar
- IRDO – Integrated Rural Development Organisation, Chennai
- IRDO – Integrated Rural Development Organisation, Dharmapuri
- IRDS – Institute for Research & Documentation in Social Sciences, Lucknow
- IRDS – Integrated Rural & Urban Development Society, Prakasam
- IRDS – Integrated Rural Development Society, Kottayam
- IRHA – International Rural Health Association, Ahmedabad
- IRPDS – Integrated Rural People Development Society, Thiruvannamalai
- IRPSEDO, Vellore
- IRS – Innovative Rural Services, Prakasam
- IRSD – Integrated Rehabilitation Service for Disabled, Secunderabad
- Isaac Educational & Charitable Trust, Erode
- ISARD – Indian Society for Applied Research & Development, Delhi
- ISDO, Dharimapuri
- ISDRA – Institute of Social Development Research & Action, Raebareli
- Ishar Das Memorial Samiti, Jaipur
- ISHO – Indian Students Health Organisation, Ernakulam
