Lacombe takes its name from Oblate missionary Albert Lacombe, remembered for mediating between Cree and Blackfoot communities and helping the Canadian Pacific Railway negotiate passage through Blackfoot territory. Retired Mountie Ed Barnett opened a stopping house on the Calgary and Edmonton Trail in the early 1880s; locals first called the spot Barnett's Siding.
The railway reached the area in 1891, village status followed in 1896, and CPR president William Van Horne pushed the Father Lacombe name into official use. A federal experimental farm opened in 1907, and the downtown still shows off one of Alberta's better-preserved stretches of early commercial brick.