YA

YA, yA, or Ya may refer to:

Language

 * Ya (arrow), the Japanese word for an arrow
 * Ya (Cyrillic) (Я), a Cyrillic alphabet letter
 * Ya (Javanese) (ꦪ), a letter in the Javanese script
 * Ya (kana), the Romanization of the Japanese kana や and ヤ
 * Yāʼ (ي),an Arabic letter
 * Ya, a vocative particle in Arabic and other Semitic languages
 * Ya (hangul) (ㅑ), a letter in the Korean hangul alphabet

Units of measurement

 * years ago (ya), a unit of time
 * Yoctoampere (yA), an SI unit of electric current
 * Yottampere (YA), an SI unit of electric current

Arts, entertainment, and media

 * ¡Ya!, an album by the band Marquess
 * Я (transliterated ya, meaning I am), a 2009 Russian sci-fi film (ru:Я (фильм)) with Artur Smolyaninov and Oksana Akinshina
 * Yahoo! Answers (YA), a community-driven question-and-answer site
 * Young Ace (YA), a Japanese magazine
 * Young adult fiction, fiction marketed to young adults

Other uses

 * Ya (river), a river in Tynset municipality in Innlandet county, Norway
 * Yet another (YA), a common initial part of acronyms
 * YoungArts (YA), a scholarship program for American high school students
 * A US Navy hull classification symbol: Ash barge (YA)