RIS

RIS may refer to:


 * Radio Information Service, a reading service for the blind in Pennsylvania, US
 * Radiological information system, for the electronic management of information related to medical imaging
 * Radiologically isolated syndrome, suggesting multiple sclerosis
 * Rail Integration System, for attaching accessories on firearms
 * Microsoft Remote Installation Services, booting computers via PXE
 * Reparto Informazioni e Sicurezza, a military intelligence agency of Italy, see SIOS
 * Republik Indonesia Serikat (Republic of the United States of Indonesia)
 * RIS Info, later RDS Info, Canadian sports broadcaster
 * Reverse Image Search
 * Reviving the Islamic Spirit, an Islamic conference in Canada
 * Riverside Indian School
 * RIS (file format), for citation programs
 * RIS Delitti Imperfetti, an Italian TV series
 * R. I. S. – Die Sprache der Toten, a German TV series
 * R.I.S, police scientifique, a French TV series
 * Rishiri Airport, Japan, IATA airport code
 * Rishton railway station, England, station code
 * Ruamrudee International School, Thailand
 * Russian imperial stout, a strong dark beer