Gargiya-jyotisha (IAST: Gārgīya-jyotiṣa), also known as Garga-samhita (IAST: Garga-saṃhitā), is a 1st-century Indian Sanskrit-language astrological treatise attributed to Garga. The oldest extant text of the Indian astrology (jyotiḥśāstra), it is written in form of a dialogue between Garga and Kraushtuki.