Ullaṅgha 欝楞迦 (Sanskrit Ullaṅgha or Ullaṅkha; sometimes transcribed 鬱楞伽; honorifically 聖者 ārya) was an Indian Buddhist ācārya of uncertain dates, presumably of the late fifth or sixth century. He is known to East Asia exclusively as the author of a short verse-and-prose treatise on the twelve links of dependent origination, transmitted in two parallel Chinese translations: the Yuán-shēng lùn 緣生論 (KR6o0056, translated by 達磨笈多 / Dharmagupta in the Suí period) and the Dà-shèng yuán-shēng lùn 大乘緣生論 (KR6o0057, retranslated by 不空 / Amoghavajra in the Táng period). The two Chinese versions render the same Indic original. Beyond the two Chinese translations, no Tibetan parallel and no Sanskrit witness of Ullaṅgha’s work survives, and no biographical information is available. The doctrinal frame is Yogācāra, possibly Cittamātra-Yogācāra of the post-Vasubandhu period.