Private Residential Care Facilities (RCFs) fill the gap between independent community living and institutional settings for seniors. There are marked differences between RCFs which make them difficult to compare. To address this issue, the objective of this study was to develop and validate a classification of RCFs based on their physical and organizational environments. RCF owners across Quebec were invited to complete a questionnaire that described the setting’s physical and organizational environment. Different combinations of cluster analysis methods and statistical parameters were used to identify plausible classifications. The final choice was made by an expert committee. Overall, 552 owners returned the questionnaire. Three plausible classifications were submitted to the committee. The selected classification included five clusters that differed with regard to admission criteria, services offered and recreational activities. This classification could help health professionals select the RCF that best responds to older adults’ needs.