Data from a randomly selected sample of 840 Ontario students were used to examine factors that affect self-rated physical health. Analyses focused on demographics, family structure, financial situation, child-parent relationship, school achievement, self-esteem, alcohol, tobacco, and cannabis use as factors which directly and indirectly influence self-rated health. Analyses suggest that student perceptions of physical health are affected by demographic, economic, psychological, and competency factors. (Author/MKA)