Yin may refer to:
*the dark force in the
yin and yang from traditional Chinese philosophy and medicine
*
Yīn (surname) (), a Chinese surname
*
Yǐn (surname) (), a Chinese surname
*
Shang dynasty, also known as the Yin dynasty
**
Yinxu or Yin, the Shang dynasty capital now in ruins
*
Yin (Five Dynasties period), a short-lived kingdom during China's Five Dynasties and Ten Kingdoms period
*
Yin Mountains, a mountain range in Inner Mongolia and Hebei province in China
*Yin (, ''yǐn''), an office of early China sometimes equivalent to prime minister and sometimes to governor
**
Prime minister (Chu State), known in Chinese as Lingyin.
{{dab