- SCORD, Thiruvarur
- Score Society for Community Organization & Rural Education, Karur
- Scuba Social Service Organization, Thanjavur
- SDD – Society for the Development of the Depressed, Tiruvannamalai
- SDRWC India – Society for the Development of Rural Women and Children, Prakasam
- SDS – Saurashtra Dalit Sangathan, Junagadh
- SDS – Social Development Society, Malkangiri
- SEA – Society for Education & Action, Kanchipuram
- SEA – Society for Empowerment & Advocacy, Bharatpur
- Sea ( Scholar Educational Academy), Hyderabad
- SEADEST, Haridwar
- Search – Ne, Sipajhar
- SEARCH – Society for Education on Aids & Rehabilitation Centre for Home Less, Hyderabad
- SEARCH – Society for Environmental Awareness Rehabilitation of Child & Handicapped, New Delhi
- SEARCH – Society of Education & Action Research for Community Harmony, Rourkela
- Search Analysis & Training for Healthy India, Gorakhpur
- Search Club, Kanpur
- Search Foundation, Mumbai
- Search Organization, Nalgonda
- Search Sewa Sansthan, Sri Ganganagar
- Search Swachanda Seva Samstha, Karimnagar
- Search Years, Gurgaon
- Search, Bangalore
- SEARCH, Guntur
- Searcher Charitable Trust, Patna
- SEAWS – Sanjeevani Educational and Welfare Society, Lucknow
- Seba Jagat, Kalahandi
- Seba Trust, Cooch Behar
- Sebalaya Health & Research Centre, Howrah
- SECHO – Social Education & Community Health Organisation, Dhenkanal
- SECRET – Society for Educational & Cultural Experties & Training, Cooch Behar
- SECS – Society for Education, Culture & Social Welfare, Sambalpur
- Secular Mahila Mandal Poonch, Poonch
- SECURA, Dungarpur
- SECWET – Social Economic & Community Welfare Trust, Theni
- SEDA – The Socio Economic Development Association, Thoubal
- SEDO – Socio Economic Development Organization, Thoubal
- SEDS, Jammu
- SEED – Social Education & Economic Development Trust
- SEED – Society for Economic & Environmental Development, Alappuzha
- SEED – Society for Education & Economic Development, Nagapattinam
- SEED – Society for Empowerment & Economic Development, Guwahati
- SEED – Society for Environment Education & Development, Lucknow
- SEED – Socio – Economic Establishment for Development, Vellore
- Seed Foundation, Pudukkottai
- SEED NGO, Karur
- SEED TRUST – Socio Economic Education Development Trust, Villupuram
- SEED, Karur
- SEED, Mirzapur
- Seeda Socio Economic Education Development Action, Dharwad
