Year 159 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Dolabella and Nobilior (or, less frequently, year 595 Ab urbe condita) and the Fifth Year of Houyuan. The denomination 159 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.