Xiao may refer to:

Filial piety (Chinese: 孝; pinyin: Xiào), or "being good to parents", a virtue in Chinese culture

Xiao (flute) (Chinese: 箫), a Chinese end-blown flute

Xiao (rank) (Chinese: 校), a rank used for field officers in the Chinese military

Xiao County (Chinese: 萧县), in Anhui, China

Xiao Mountain (Chinese: 崤山), a range of mountains in Henan, China, or the surrounding Xiao region

Xiao River (Chinese: 潇水), a tributary of the Xiang River, in Hunan, China

Xiao (mythology) (Chinese: 嚣), certain legendary creatures in Chinese mythology

Ling Xiaoyu, a character from the Tekken video game series, also known as Xiao

Xiao, a character in 2020 video game Genshin Impact