Una and UNA may refer to:

• Una River (disambiguation), numerous rivers
• Una District, in Himachal Pradesh, India
• Una, Himachal Pradesh, a town in India
• Una, Gujarat, a town in India
• Una, California, an unincorporated community in the United States
• Una, Mississippi, an unincorporated community in the United States
• Una, Bahia, a town in Brazil

Uña is a municipality located in the province of Cuenca, Castile-La Mancha, Spain. According to the 2004 census (INE), the municipality has a population of 138 inhabitants.

Úna is an Irish language feminine given name. It may be derived from the Irish word uan (lamb). Alternative spellings are Oona and Oonagh. The Scottish Gaelic form is Ùna.