Hsu is a Wade-Giles romanization of one of two Chinese surnames:
- Chinese: 徐; pinyin: Xú; Wade–Giles: hsü2
- simplified Chinese: 许; traditional Chinese: 許; pinyin: Xǔ; Wade–Giles: hsü3
The equivalent in the pinyin romanization of Mandarin is Xu.
Hsu as a surname may refer to:
- Dan Hsu (born 1971), American Video game critic
- Dee Hsu
- Evonne Hsu
- Feng-hsiung Hsu
- Francis Hsu
- Hsu Hai-ching
- Hsu Hsing-liang
- Jenny Hsu, of the band Other Lives
- Jerry Hsu
- Kenneth J. Hsu (born 1929), Swiss scientist
- Norman Hsu (born 1951), American businessman
- Steve Hsu
- T. C. Hsu
- Valen Hsu
- Vivian Hsu
- Yuki Hsu
- Hsu Wei Lun
- Hsu Yun
In addition, Hsu appears as part of the names of:
- Magdalen Hsu-Li
- Hsu Hao, a character in Mortal Kombat