The Aranmula Parthasarathy Temple, located on the banks of the Pamba River in Pathanamthitta district, Kerala, is a significant Hindu shrine dedicated to Lord Krishna. The temple's name, Aranmula, is derived from the legend that the idol of the deity was brought here on a raft made of six (aru) pieces of bamboo (mula), giving the place its unique name. This temple is renowned for its deep cultural and spiritual significance and its connection to the Mahabharata, where Lord Krishna served as the charioteer (Parthasarathy) to Arjuna.

The temple is a masterpiece of traditional Kerala architecture, with intricate wood carvings on its roof and pillars that depict scenes from the Ramayana and the Mahabharata. The walls of the shrine are adorned with paintings dating back to the early 18th century, adding to its historical and artistic value.

One of the temple's most celebrated events is the Valla Sadya, a grand feast held during the Malayalam month of Chingam, coinciding with Ashtami Rohini, the birthday of Lord Krishna. This feast features up to 64 dishes and is a significant part of the temple's rituals. An interesting aspect of the Valla Sadya is the theatrical manner in which the guests, particularly the rowers of the snake boats, demand more food by singing in the Vanchippattu style. It is believed that satisfying these demands pleases Lord Krishna, making it a sacred ritual. The feast is served daily from mid-August to the beginning of October, during the Onam festival, and is considered a ritual offering to the snake boat rowers.

Aranmula is also famous for its connection to the legendary Mahabharata, as it is one of the five ancient temples in the Chengannur area believed to have been built by the Pandavas. The Aranmula Parthasarathy Temple, attributed to Arjuna, is one of the 108 Divya Desams, sacred temples of Vishnu revered by the Alwar saints in the early medieval Tamil canon.

The temple is also a stop on the procession route of the sacred jewels (Thiruvabharanam) of Ayyappan, taken annually to Sabarimala from Pandalam. Additionally, the golden attire (Thanka Anki) of Lord Ayyappa, donated by the King of Travancore, is stored here and ceremoniously transported to Sabarimala during the Mandala season in late December.