Ludger Lemieux (February 9, 1872 – October 27, 1953) was a Quebec architect who designed a number of notable Art deco structures in Montreal's Saint-Henri district.

[1] While he often worked in partnership with Joseph-Honoré MacDuff, his best-known structure, the Atwater Market, was designed not with MacDuff but with his son Paul M.

[2] He was born in Farnham, Quebec to parents Moïse Lemieux and Marie Melanie Serre.

[3] He studied at McGill University[4] before his architectural practice after 1897.

[2] Lemieux, his partner as well as his sons were involved in 500 projects from the late 19th Century to mid 20th Century:[5] Ludger is a bar in Saint-Henri named after Lemieux.