- Amuthasurabi Women Development Society, Theni
- ARISE, Theni
- Arogya Agam, Theni
- Care Trust, Theni
- Community Action for Rural Empowerment, Periakulam
- Community Development Society
- D.S.P Educational Trust, Bodinayakkanur
- Development of Women and Children Trust, Theni
- Dhanvandhiri Mentally Retarded & Drug Addictors Welfare Association, Theni
- Elite Service Trust, Theni
- Gramiam Sangh, Uthamapalayam
- GREEN, Theni
- Help Trust, Theni
- Hussain Mohamed Ismail Charitable Trust, Theni
- IMAI Trust – Institution of Mass Awareness Initiatives, Theni
- Literates Welfare Association, Theni
- Lotus Rural Development Trust, Theni
- Maitri Society, Theni
- Medical Educational & Social Awareness for People Trust, Theni
- Mother Land Organization, Theni
- Mother Therasa Trust, Theni
- Nesam Trust, Theni
- Ramalakshmi Educational Trust, Theni
- Relief Trust, Bodinayakanur
- Rural Womens Education & Environmental Protection Society, Theni
- Sadhana Trust, Theni
- SAKTHI, Vidiyal
- SECWET – Social Economic & Community Welfare Trust, Theni
- Society for Rural Development & Protection of Environment, Theni
- SRWDT – Sangamam Trust, Theni
- The Health Wealth Social Service Trust, Periyakulam
- The Health Wealth Social Service Trust, Theni
- Theni Social & Charitable Trust
- Thulir Charitable Trust, Theni
- Told Trust, Theni
- United Trust, Uthamapalayam
- Vasandham Society, Theni
- Vivekananda Seva Trust, Theni
- Voice – Voluntary Organization for Integration of Community & Environment, Theni
- Weed Trust, Theni
- Women Development & Educational Trust, Theni