Mansa Devi Temple, Haridwar (Hindi: मंसा देवी मंदिर, हरिद्वार) is a Hindu temple dedicated to goddess Mansa Devi in the holy city of Haridwar in the Uttarakhand state of India. The temple is located atop the Bilwa Parvat on the Sivalik Hills, the southernmost mountain chain of the Himalayas. The temple also known as Bilwa Tirth is one of the Panch Tirth (Five Pilgrimages) within Haridwar.

The temple is known for being the holy abode of Manasa, a form of Shakti and is said to have emerged from the mind of the lord Shiva. Mansa is regarded as the sister of the Nāga (serpent) Vasuki. The term Mansa means wish and it is believed that the goddess fulfils all the wishes of a sincere devotee. Devotees who want their wishes to be fulfilled by Mansa tie threads to the branches of a tree located in the temple. Once their wishes are fulfilled, people come back again to the temple to untie the thread from the tree. Mansa is also offered coconuts, fruits, garlands and incense sticks in order to appease her.

Mansa Devi Temple is a Siddh Peetha which are the places of worship where desires get fulfilled. It is one of three such Peethas located in Haridwar, the other two being Chandi Devi Temple and Maya Devi Temple.[3] The inner shrine has two deities installed, one with eight arms and the other one three headed with five arms[4]