# Y (disambiguation)

Y, or y, is the twenty-fifth letter of the English alphabet.
Y or y may also refer to:

## Places

* Y, Alaska, US
* Y, Somme, France
* Y (river), a river in northern Russia
* Postal code Y indicating Yukon (see List of Y postal codes of Canada)

## Art, entertainment, and media
### Comics

* Y: The Last Man, a DC comics series by Brian K. Vaughan

### Film and television

* Y (2017 film), a Malayalam film directed by Sunil Ibrahim
* Y (2022 film), an Indian Marathi-language thriller film
* Y, the production code for the 1966 Doctor Who serial The Celestial Toymaker
* Y?, An educational children's science program shown on the Nine Network in Australia
* Y: The Last Man (TV series), an American drama based on the comic book series Y: The Last Man

### Games

* Y (game), a board game played on a triangular board
* Pokémon Y, a video game for the Nintendo 3DS

### Literature

* Y (novel), a 2012 novel by Marjorie Celona
* "Y", a poem by Patti Smith from her book Early Work (1994)
* "Y" Is for Yesterday, the twenty-fifth and final novel in Sue Grafton's "Alphabet mystery" series, published in 2017

### Music
#### Albums

* Y (EP), a single album by MBLAQ
* Y (The Pop Group album), an album by The Pop Group
* Y. (Bebe album), an album by Spanish singer Bebe
* Y, a repackaged edition of I, by Jaejoong
* 01011001 (binary number for 'Y' in ASCII), an album by Dutch progressive metal project Ayreon

#### Songs

* "y", a 2010 song by iamamiwhoami from the album bounty
* "Y..." a track on Belanova's Cocktail
* "Y", a 1961 song composed by Mario de Jesús Báez which has been covered by several artists including Luis Miguel on the album Vivo (2000)
* "Y", a 2021 song by Citizen Queen

## Economics and finance

* ¥, the symbol for Japanese yen
* Y, the symbol for income

## Enterprises and brands

* Alleghany Corporation, NYSE ticker symbol Y
* Brigham Young University, commonly known throughout the Mormon Corridor as "the Y" (as its rival, the University of Utah, is known as "the U")
* Y Combinator (company), American seed brand
* Y-Front a trademark for briefs by Jockey International, used in Britain as a synonym of briefs
* YM-YWHA, aka "the Y"
* YMCA, aka "the Y"
* YWCA, aka "the Y"

## Language

* Y (Cyrillic)
* y (IPA), the International Phonetic Alphabet letter for a close front rounded vowel

## Mathematics

* Y combinator, a fixed-point combinator in combinatory logic
* Y, the Bessel function
* Y, dependent variable
* Y or y, vertical axis in the Cartesian coordinate system

## Science

* Y, admittance, the inverse of electrical impedance Z
* Haplogroup Y (mtDNA)
* Hyperon
* Luminance (video), in many video color models, such as YIQ and YUV
* Tyrosine, abbreviated Y or Tyr
* Y boson
* Y chromosome
* y, year, a non-SI abbreviation for this unit of time
* Yellow, in the CMYK color model
* y, yocto-, the SI prefix for 10$^{−24}$
* Y, yotta-, the SI prefix for 10$^{24}$
* Yttrium, symbol Y, a chemical element
* Y, a hypothetical stellar class of ultra-cool dwarf stars

## Transportation and travel

* Y (New York City Subway service), an unused New York City Subway service label
* Tokyo Metro Yurakucho Line, a subway service operated by the Tokyo Metro, labeled
* Yotsubashi Line, a subway service operated by the Osaka Metro, labeled
* Basque Y, a Spanish high-speed rail network so called for its Y shape
* Y, code for economy class
* Yaesu Route of Shuto Expressway in Tokyo, Japan, numbered as Route Y
* , the official West Japan Railway Company service symbol for the Kure Line.

## Other uses

* Ⓨ, a typographical symbol in Japanese resale price maintenance
* Generation Y
* Ms Y (or just "Y"), a refugee to Ireland involved in Irish court cases concerning abortion in the 2010s
* Y-shape, the shape that resembles the letter Y
* Y-stations, World War 2 listening stations
* Yankee, the military time zone code for UTC−12:00
* Aion Y, a Chinese electric SUV