Ren or REN may refer to:
Abbreviations
- Orenburg Tsentralny Airport, IATA code REN, civil airport in Russia
- Redes Energéticas Nacionais (REN), Portuguese company
- Renanthera, abbreviated as Ren, orchid genus
- Ringer equivalence number (REN), a number which denotes the loading effect of a telephone ringer on a telephone line
Geography
- Ren County, in Hebei, China
- Ren, Iran, a village in Kerman Province, Iran
- Ren (building), a high-rise residential building in Seattle, Washington, United States
Science, technology and medicine
- REN (gene)
- Ren, in anatomy, a kidney
- Ren (command), a shell command in computing
People
- A diminutive of the given name Renée
- Ren (surname) (任), Chinese surname
- MC Ren, rapper from the group NWA
- Ren (singer), member of South Korean boy band NU'EST
- Ren Gill, Welsh-born, UK-based singer-songwriter, rapper, poet, producer and multi-instrumentalist.
- Renforshort, Canadian singer formerly known as Ren
- Ren Yano (矢野 仁), Japanese traditional calligrapher
- Shōji Ren (庄司 廉, 1887-1960), Japanese businessman
- Ren Osugi (大杉 漣, 1951–2018), Japanese actor
- Ren Sato (politician) (佐藤 錬, born 1951), Japanese politician
- Ren Sengoku (仙石 廉, born 1990), Japanese football player
- Ren Ozawa (小澤 廉, born 1991), Japanese actor
- Ren Kazahari (風張 蓮, born 1993), Japanese baseball pitcher
- Ren Wada (和田 恋, born 1995), Japanese baseball player
- Ren Ikeda (池田 廉, born 1997), Japanese footballer
- Ren Kawashiri (川尻 蓮, born 1997), Japanese singer and member of JO1
- Ren Yamamoto (footballer, born 1997) (山本 蓮}, born 1997), Japanese footballer
- Ren Meguro (目黒 蓮, born 1997), Japanese singer, actor, and member of Snow Man
- Ren Narita (成田 蓮, born 1997), Japanese wrestler
- Ren Hiramoto (平本 蓮, born 1998), Japanese mixed martial artist
- Ren Omagari (大曲 錬, born 1998), Japanese baseball player
- Ren Yamakawa (山川 廉}, born 1998), Japanese footballer
- Ren Yamamoto (footballer, born 1999) (山本 廉}, born 1999), Japanese footballer
- Ren Nagase (永瀬廉, born 1999), Japanese singer, actor, and member of King & Prince
- Ren Kato (加藤 蓮, born 1999), Japanese footballer
- Ren Fujimura (藤村 怜, born 1999), Japanese football player
- Ren Ishihara (石原 怜, born 2001), Japanese footballer
- Ren Sato (racing driver) (佐藤 蓮, born 2001), Japanese racing driver
Religion
- Ren[broken anchor], "name, identity", an Ancient Egyptian concept of the soul or spirit
- Ren (Confucianism), Confucian concept
Fictional characters
Single name
- Ren, the titular heroine from the fantasy webseries Ren: The Girl with the Mark from Mythica Entertainment and Kate Madison
- Ren (Tsukihime), a character from the game Kagetsu Tohya and Melty Blood: Re-ACT
- Ren, son of Primus, protagonist of the animated series The Pirates of Dark Water
- Ren (Star Wars) (not to be confused with Kylo Ren), a character in the Star Wars franchise
First name
- Ren Akiyama, a character in the tokusatsu series Kamen Rider Ryuki
- Ren Amamiya, the name used for Joker, the main protagonist, in the anime adaptation of Persona 5
- Ren Ashbell, an alias used by the protagonist of Bladedance of Elementalers, Kamito Kazehaya
- Ren Gottlieb, a character from the Australian soap Neighbours
- Ren Höek, a fictional chihuahua from the Nickelodeon animated series The Ren & Stimpy Show
- Ren Honjo, a character from the manga, anime, and film NANA
- Ren Mihashi, main character from the manga, anime and game from Big Windup!
- Ren Jinguuji, a character from the anime, game and manga from Uta no Prince-sama
- Ren Karas, a character from the anime and manga Element Hunters
- Ren Krawler, the Darkus protagonist from the animated series Bakugan: Gundalian Invaders
- Ren, a character from the game and anime "DRAMAtical Murder"
- Ren, a character from the video game Oxenfree
- Renn Kousaka, main character from the 2008 Japanese tokusatsu television series, Go-ongers
- Ren Maka, a character from the anime Chibi Vampire
- Ren McCormack, the main character from the film Footloose
- Ren Ren Ren Nagusaran Renshia Rurunnren Nakora, heroine of DearS
- Ren Senjyu, a character from Ultraman Nexus
- Ren Sohma, the mother of Akito Sohma in the manga Fruits Basket
- Ren Stevens, a character from Even Stevens
- Ren Tsuruga, character in the manga Skip Beat
- Tao Len, sometimes romanized as Tao Ren, a character in Shaman King
- Ren Suzugamori, a character in the anime series Cardfight!! Vanguard
- Ren Hiyama, a character in the game and anime series Little Battlers Experience
- Ren Hazuki, a character in the anime series Love Live! Superstar!!
Last name
- Wuying Ren, a character from Shenmue II
- Kylo Ren, a character from the Star Wars sequel trilogy
- Hakuryuu Ren, Fourth Imperial Prince of Kou in the anime Magi: The Labyrinth of Magic and Magi: The Kingdom of Magic
- Lie Ren, a character from the American animated series RWBY
Other uses
- Ren (fictional weapon), an alternate term for lightsaber in the Star Wars franchise
- REN TV, a Russian free-to-air television network
- Ren - meaning to connect or link in Japanese culture - see also renga / renku
- Ren - the name given to the Chinese sports car Techrules Ren.