Lachance is a surname. Notable people with the surname include:
Arthur Lachance (1868–1945), Canadian politician Candy LaChance (1870–1932), American professional baseball player Claude-André Lachance (born 1954), Canadian lawyer and politician Imogen LaChance (1853-1938), American social reformer Michel Lachance (born 1955), Canadian professional hockey player Scott Lachance (born 1972), American professional hockey player Walter William LaChance (1870–1951), Canadian architect