Background: The current study examined the categorical versus continuous nature of child and adolescent depression among three samples of children and adolescents ranging from 5 to 19 years. Methods: Depression was measured using the Children's Depression Inventory (CDI). Indicators derived from the CDI were based on factor analytic research on the CDI and included indices of: 1) social withdrawal, 2) anhedonia, 3) incompetence/maladjustment and 4) negative self-esteem. Results: Taxometric procedures provided convergent support for the existence of a latent taxon across three independent samples. Internal and external consistency tests as well as Monte Carlo simulations supported the validity of the results. Conclusions: Multiple nonredundant procedures and samples were all consistently indicative of taxonicity in child depression.