UNF may refer to:
Technology Unified National Fine screw thread , a Unified Thread Standard Unnormalized form, a database data model
Organizations UniFirst, a US supplier of uniforms United National Front (Afghanistan) United National Front (Sri Lanka) United Nations Foundation, a fund-raising organization University of North Florida, Jacksonville, US , the Danish Youth Association of Science , a Swedish youth temperance organisation or National Fascist Union, Argentina, 1936-1939 or National University of Formosa, Argentina