Lam (plural Lams)
- A surname.
- According to the 2010 United States Census, Lam is the 611st most common surname in the United States, belonging to 55554 individuals. Lam is most common among Asian/Pacific Islander (87.99%) individuals.
- A Filipino-Chinese surname of Cantonese origin.
According to data collected by Forebears in 2014, Lam is the 1,559th most common surname in the Philippines, occurring at 6,896 individuals.