Yin may refer to:

• Yin Dynasty, another name for the first historic Chinese nation and dynasty, the Shang.
• Yin (city), the capital of the latter half of the Yin (Shang) Dynasty.
• Yin (surname), a rare Chinese surname
• Yin is YIN Chengzong, a premier Chinese pianist and composer who arranged the Yellow River Concerto
• Yin is one of two opposing forces in Chinese philosophy; see yin and yang
• Yin (book) is a book by Carolyn Kizer