Saint-Just-Saint-Rambert () is a commune in the Loire department in central France.
Saint-Just-Saint-Rambert was created in 1973 by the merger of two former communes: Saint-Just-sur-Loire and Saint-Rambert-sur-Loire.
The population data given in the table and graph below for 1954 and earlier refer to the former commune of Saint-Rambert-sur-Loire.
Saint-Just-Saint-Rambert is twinned with: