Surname
- Liu (劉/刘), a common Chinese family name transliterated Lau in Cantonese
- Andy Lau (born 1961), Hong Kong singer and actor
- Amber Liu (singer) (born 1992), Chinese singer in South Korean girl group f(x)
- Andrew Lau (born 1960), Hong Kong director and producer
- Charlie Lau (1933–1984), American catcher and hitting coach in Major League Baseball
- Evelyn Lau (born 1971), Canadian writer
- Gordon Lau (1941–1998), American politician
- Hans E. Lau (1879–1918), Danish astronomer
- Israel Meir Lau (born 1937), Orthodox Ashkenazi Chief Rabbi of Israel
- Jean Marie du Lau (1738–1792), Archbishop of Arles, killed during the French Revolution
- Laurence Lau (born 1954), American actor
- Sean Lau (born 1964), Hong Kong actor
- a Mohyal (Punjabi Brahmin) surname used in India
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