YA, yA, or Ya may refer to:
Yahoo! is a web services provider, wholly owned by Verizon Communications through Oath Inc. and headquartered in Sunnyvale, California.
The Yazidis ( yə-ZEE-dees) (Northern Kurdish: Êzidî, IPA: [eːzɪˈdiː]; Central Kurdish: ئێزیدی) are an ethnically Kurdish religious community or an ethno-religious group indigenous to northern Mesopotamia (see also Ezidkhan) who are strictly endogamous.
The Yangtze (English: or ), known in China as the Cháng Jiāng ( listen; literally: "Long River") or the Yángzǐ Jiāng ( listen), is the longest river in Asia and the third-longest in the world.
Yahoo Mail, a web-based email service, launched in 1997 through the American parent company Yahoo. Yahoo Mail provides four different email plans: three are for personal use (Basic, Plus, and Ad Free) and another is paid-for business use.