The typical Norman surname Lalonde or LaLonde (archaic spelling) may refer to:
- Amy Lalonde, Canadian television personality
- Brice Lalonde (born 1946), French politician
- Donny Lalonde (born 1960), Canadian boxer
- Francine Lalonde (born 1940), Canadian politician, MP for La Pointe-de-l'Île
- Gisèle Lalonde (born 1933), Canadian politician, mayor of Vanier from 1985 to 1991
- Jean-Marc Lalonde (born 1935), Canadian politician, member of Legislative Assembly of Ontario
- Larry LaLonde (born 1968), guitarist for rock group Primus
- Marc Lalonde (born 1929), Canadian politician, author of the Lalonde report
- Newsy Lalonde (1887-1970), Canadian ice hockey player
- Pierre Lalonde (born 1941), Canadian singer and television host
- Raymond "Lala" Lalonde (born 1940), Louisiana politician and educator
- Ron Lalonde (born 1952), Canadian ice hockey player
It may also refer to:
- Lalonde report, 1974 report on the health of Canadians