Upa or UPA may refer to:
Law Undesirable Publications Act, a 1967 Singapore statute Uniform Parentage Act, a model statute proposed by the U.S. NCCUSL Uniform Partnership Act, another model statute proposed by the U.S. NCCUSL
Organizations Associations Ulster Protestant Association, loyalist paramilitary group in Northern Ireland Union des producteurs agricoles, Canada United Patternmakers' Association, former British trade union United Press Association, a news agency that became United Press International Universal Powerline Association Utenti Pubblicità Associati, Italian Advertisers' Association
Health Unidade de Pronto Atendimento (Emergency Care Unit), a type of health care center in Brazil
Business United Productions of America, an American animation studio
Education Universidad de Playa Ancha, Chile (or UPLA) University Preparatory Academy, San Jose, California University Preparatory Academy (Detroit) University Press of America, academic publisher
Politics Uganda People's Army, a rebel group active from 1987 to 1992 Ulster Protestant Action, Northern Ireland União dos Povos de Angola (National Liberation Front of Angola) United Progressive Alliance, India Ukrainian People's Army, a Ukrainian nationalist military force between 1917 and 1921 Ukrainian Insurgent Army (Ukrayinska Povstanska Armiya), a Ukrainian nationalist paramilitary active between 1942 and 1956
Places Upa, Azerbaijan, a village in Khizi Rayon Upa, Estonia, village in Saaremaa Parish, Saare County, Estonia Upa (river), in Russia Úpa, a river in the Czech Republic
Science and technology Ultra Port Architecture, a computer bus Unique Particle Attribution, a mechanism to prevent ambiguity in XML Schema Urokinase, an enzyme involved in the biology of humans and other animals Ulipristal acetate, a medication
Sports Bridge (grappling) or upa, a move in Brazilian jiu-jitsu United Pickleball Association United States Professional Poolplayers Association
Other Upa, a character in Bio Miracle Bokutte Upa Urban Partnership Agreement, an effort by the US Department of Transportation to reduce congestion Urban Protection Agency, a fictional organisation in Project Eden Uralic Phonetic Alphabet, a transcription system sometimes used in the study of Uralic languages
See also 'upa'upa, a Tahitian dance