Kashtha Sangha (काष्ठा संघ) was a Digambar Jain monastic order once dominant in several regions of North and Western India. It is considered to be a branch of Mula Sangh itself. It is said to have originated from a town named Kashtha.
The origin of Kashtha Sangha is often attributed to Lohacharya in several texts and inscriptions from Delhi region. The Kashtasangh Gurvavali identifies Lohacharya as the last person who knew Acharanga in the Digambara tradition, who lived until the 683rd year of the nirvana of Lord Mahavira. the Darshanasara of Devasena (VS 990) attributes the origin to Kumarasena in Vikram Samvat 753.
Several of the Jain communities were affiliated with the Kashtha Sangha. The Agrawal Jains were the major supporters of Kashtha Sangha. They are said to have been initiated by Lohacharya in antiquity. Muni Sabha Singh writes in his Padma Purana (VS 1711)
काष्ठा संघी माथुर गच्छ, पहुकर गण में निरमल पछ||
महा निर्ग्रन्थ आचारज लोह, छांड्या सकल जाति का मोह||
अग्रोहे निकट प्रभु ठाढे जोग, करैं वन्दना सब ही लोग||
अग्रवाल श्रावक प्रतिबोध, त्रेपन क्रिया बताई सोध||
Kashta Sangha included several orders:
Kashta Sangha eventually merged into Mula Sangh. The celebrated poet and pratishthacharya Raighu was a disciple of the Kashtha Sangh Bhattarakas of Gwalior.
The rock carved Jain statues in the Gwalior Fort were mostly consecrated by the Kashtha Sangh Bhattarakas, as stated in the inscriptions dated between 1441 and 1474.