UAG may stand for:
Biology In biology, the "amber" stop codon UAG; see genetic code
Education Universidad Autónoma de Guadalajara, the first private university and host to a large medical school in Mexico. University of Arkansas Grantham
Sports The African Gymnastics Union (French: l'Union Africaine de Gymnastique) Estudiantes Tecos, a Mexican professional football (soccer) club, previously associated with the Universidad Autónoma de Guadalajara, and as Tecos UAG
Technology Microsoft Forefront Unified Access Gateway, Microsoft solution for remote access to corporate applications VMware Unified Access Gateway
Transportation Afra Airlines (ICAO code UAG), an airline in Ghana United Auto Group, an American automotive retailer
Video games UAG, a video game also known as Thundercade