The objective of this cohort study is to describe the service utilization by clients of homeless resources in Quebec and Montreal (Canada) over a 5-year period. Participants (N=426) were recruited from a survey conducted in 1999 about clients’ utilization of resources intended for homeless people in Montreal and Quebec. Data analyzed in this study were also drawn from three administrative databanks managed by the Quebec health care system. Results revealed that: (1) in general, mental health services are less used than physical health services; (2) generally, women, older persons, nonhomeless persons, and persons with mental health problems utilized proportionately more health services; and (3) participants involved in this study tend to continue using services over years in a system where health services are free. These findings are discussed in terms of long-term service utilization by clients of homeless resources.