Yass may refer to:
People Catherine Yass (born 1963), painter Jeff Yass (born 1958), options trader, managing director and one of the five founders of the Philadelphia-based Susquehanna International
Places Yass, New South Wales, a town in Australia Municipality of Yass, original local government for the town until 1980 Yass Valley Council, a local government area (shire) in New South Wales since 2004 Yass Valley Way, the main road through Yass that was part of the Hume Highway before a bypass was constructed in the 1990s Yass River, a river in the state of New South Wales, Australia
Other uses Yass (software), a genomic local alignment tool YASS (programming language), a programming language designed to be easy to learn Yass (music), a style of Polish jazz music from the 1980s and 1990s Yas (slang), a form of the word "yes" in LGBT slang
See also Jass, a card game Yazz, a British pop singer