Arpa or ARPA may refer to:
Given name Arpa Ke'un (died 1336), Ilkhan during the disintegration of the Mongol state in Persia
Surname José Arpa (1858–1952), Spanish artist who worked in Spain, Mexico, and Texas Okay Arpa (born 1977), Turkish karateka Yvan Arpa, Swiss watch designer
Geographical names Areni, formerly Arpa, a village in Armenia Arpi, Armenia, also known as Arpa, a town in Armenia Arpa (river), in Armenia Arpa (river), Chhattisgarh in Chhattisgarh, India Akhurian River, Arpa in Turkish, river in Turkey and Armenia Arpa Darreh, a village in Iran Arpa Valley, a high-altitude valley in Kyrgyzstan
Music Arpa d'Eolo, a musical instrument Arpa jarocha, a Mexican harp used in conjunto jarocho music Rinaldo dall'Arpa (died 1603), Italian composer, singer, and harpist
Acronym Advanced Research Projects Agency, former name of the US Defense Advanced Research Projects Agency ARPA-E, the Advanced Research Projects Agency-Energy, an agency created in 2007 within the US Department of Energy ARPA-H, the Advanced Research Projects Agency for Health, an organization created in 2022 within the US National Institutes of Health ARPA-I, the Advanced Research Projects Agency for Infrastructure, an organization created in 2022 within the US Department of Transportation HSARPA, the Homeland Security Advanced Research Projects Agency, an agency within the Science and Technology Directorate at the US Department of Homeland Security IARPA, the Intelligence Advanced Research Projects Activity, an organization within the US Office of the Director of National Intelligence .arpa (address and routing parameter area), a top-level domain in the Domain Name System of the Internet Aerolíneas Paraguayas, a former Paraguayan airline Agenzie Regionali per la Protezione Ambientale, the Italian Regional Environmental Protection Agency Amazon Region Protected Areas Program, an initiative to expand protection of the Amazon rainforest in Brazil American Rescue Plan Act of 2021, an economic stimulus program of the United States Archaeological Resources Protection Act of 1979, a federal law of the United States Arctic Research and Policy Act of 1984 (amended 1990) Automatic radar plotting aid, a capability of some marine radar systems Average revenue per account, a metric similar to average revenue per user
Other uses Arpa Yeghegnadzor, an inactive Armenian football club Arpa şehriye, Turkish for orzo
See also Biomedical Advanced Research and Development Authority (BARDA) Arpa Chai (disambiguation)