Ray or RAY may refer to:

Fish

* Ray (fish), any cartilaginous fish of the superorder Batoidea * Ray (fish fin anatomy), the bony or horny spine on ray-finned fish

Science and mathematics

* Half-line (geometry) or ray, half of a line split at an initial point * Directed half-line or ray, half of a directed or oriented line split at an initial point * Ray (graph theory), an infinite sequence of vertices such that each vertex appears at most once in the sequence and each two consecutive vertices in the sequence are the two endpoints of an edge in the graph * Ray (optics), an idealized narrow beam of light * Ray (quantum theory), an equivalence class of state-vectors representing the same state

Arts and entertainment

Music

* The Rays, an American musical group active in the 1950s * Ray (musician), stage name of Japanese singer Reika Nakayama (born 1990) * Ray (girl group), a Japanese girl group formed in 2019 * Ray J, stage name of singer William Ray Norwood, Jr. (born 1981) * ''Ray'' (Bump of Chicken album) * ''Ray'' (Frazier Chorus album) * ''Ray'' (L'Arc-en-Ciel album) * ''Rays'' (Michael Nesmith album) (former Monkee) * ''Ray'' (soundtrack), a soundtrack of the film ''Ray'' * ''Ray'' (EP), an album by Panic Channel * "Ray" (song), a song by Millencolin * Ray or re, the second scale degree in solfege

Fictional characters and mascots

* Ray ''(Ninjago)'', a character in ''Ninjago'' * Ray Barone, main character in the American sitcom ''Everybody Loves Raymond'' * Ray Bulgarin, minor character in GTA IV * Ray Donovan, titular main character in the American TV drama series ''Ray Donovan'' * Father Ray Mukada, priest character in the American TV drama series ''Oz'' * Ray, a character in the television series '' Bear in the Big Blue House'' * Ray, the mascot from '' Good Morning America'' * Ray, a firefly in the 2009 animated Disney film '' The Princess and the Frog'' * Ray Stantz, a main character in the American film ''Ghostbusters'' * Ray, a protagonist in '' Ray the Animation'', a science fiction anime television series * Ray, a main character in the Canadian television series ''Rusty Rivets'' * Ray the Flying Squirrel, a video game character from ''Sonic the Hedgehog'' * Ray Manchester, from the live action series ''Henry Danger'' and ''Danger Force'' * Ray (comics), a DC Comics character ** Ray (Ray Terrill), the second version of the character

Other media

* ''Ray'' (art journal), a British little magazine * ''Ray'' (manga), a manga and anime series about a doctor with X-ray vision * ''Ray'' (film), a 2004 film biography of African-American singer Ray Charles * ''Ray'' (TV series), a 2021 Netflix anthology series based on Satyajit Ray's stories * ''The Ray'' (Chardin), a 1728 painting by Jean Simeon Chardin

People

* Ray (surname) * Ray (given name) * Ray (wrestler), from Hong Kong

Places

Iran

* Ray, Iran, a city in the Greater Tehran metropolis ** Ray County, Tehran Province * Ray, South Khorasan, a small village

Russia

* Ray (Smolensk region) * Ray, Belgorod Oblast

United Kingdom

* River Ray, South East England * River Ray, Wiltshire, South West England

United States

* Ray, Alabama * Ray, Arizona * Ray, Indiana and Michigan, Steuben and Branch counties * Ray Township, Michigan, Macomb County * Ray, Minnesota * Ray County, Missouri * Ray, North Dakota

Elsewhere

* Ray, a Cambodian village in Ke Chong * Mount Ray (British Columbia), a Canadian volcano * Ray, Templeport, County Cavan, Ireland * Ray, Jharkhand, India

Technology

* Rays Linux, a defunct Chinese operating system * Sony Ericsson Xperia ray, a 2011 smartphone

Transportation

Vehicles

* Kia Ray, a 2011–present South Korean city car * Kia Ray (2010 concept vehicle), a 2010 South Korean mid-size concept sedan * Mitsuoka Ray, a 1996–2004 Japanese city car * USS ''Ray'', a U.S. Navy vessel

Other uses in transportation

* Raynes Park railway station, London, England (by GBR station code) * Rays Engineering, a Japanese automotive wheel manufacturer

Other uses

* Rays (retailer), an Australian outdoors store * Rāʾ ("ر"), a letter of the Arabic alphabet * Raha-automaattiyhdistys (Finland's Slot Machine Association), a Finnish gambling provider * Tampa Bay Rays, a Major League Baseball team