YA, yA, or Ya may refer to:
Yahoo! () is an American web services provider headquartered in Sunnyvale, California, and owned by Verizon Media.
Yazidis (also written as Yezidis) ( (listen)) are an endogamous and mostly Kurmanji-speaking group of contested ethnic origin, indigenous to Iraq, Syria, and Turkey.
The Yangtze or Yangzi (English: or ) is the longest river in Asia, the third-longest in the world and the longest in the world to flow entirely within one country.
Yakuza (Japanese: ヤクザ, IPA: [jaꜜkɯza]), also known as gokudō (極道, "the extreme path", IPA: [gokɯꜜdoː]) are members of transnational organized crime syndicates originating in Japan.