Jayasiṃha (r. c. 1092 – c. 1142), who assumed the title Siddharāja, was an Indian king who ruled western parts of India. He was a member of the Chaulukya (also called Solanki) dynasty. Jayasimha's capital was located at Anahilapataka (modern Patan) in present-day Gujarat. Besides large parts of Gujarat, his control also extended to parts of Rajasthan: he subdued the Shakambhari Chahamana king Arnoraja, and the former Naddula Chahamana ruler Asharaja acknowledged his suzerainty. Jayasimha also annexed a part of Malwa (in present-day Madhya Pradesh) by defeating the Paramaras. He also waged an inconclusive war against the Chandela king Madanavarman.