Ganga Mahasabha
{{more citations needed|date=January 2017}}
{{Use British English|date=May 2015}}
{{Use dmy dates|date=February 2025}}
{{Infobox civil conflict
| title = Ganga Mahasabha
| image =
| caption = Logo by Dr. Sunil Kushwaha
| place = Uttarakhand, Uttar Pradesh, Bihar, Jharkhand and West Bengal
| coordinates =
| causes = Pollution and damning of Ganges river in India.
| methods = Public movement
| status = Ongoing
| leadfigures1 = Non centralised leadership
| leadfigures2 = Prof. G. D. Agrawal
Justice Giridhar Malviya
Swami Jitendranand Saraswati
| leadfigures3 = Vinay Kumar Tiwari
}}
Ganga Mahasabha is an Indian organisation working for the conservation of Ganges river, founded by Madan Mohan Malviya in 1905.{{Cite web|url=http://timesofindia.indiatimes.com/city/lucknow/Giridhar-Malviya-will-do-more-justice-to-Ganga-cause-Uma/articleshow/44787404.cms|title=Giridhar Malviya will do more justice to Ganga cause: Uma | Lucknow News – Times of India}} National River Ganga Act 2012- aimed at addressing pollution in the river Ganges- was proposed by the Mahasabha but not drafted by the Indian government.