Lalín is a toponymic surname of Galician origin, derived from the municipality of Lalín.
Notable people with the surname include:
Allan Lalín (born 1981), Honduran footballer Daniel Lalín, Argentine businessman Matilde Lalín, Argentine-Canadian mathematician Wilson Lalín (born 1985), Guatemalan footballer
See also Lars Lalin (1729–1785), Swedish musician, playwright and opera singer Lalin (disambiguation)