Despite the heterogeneity of juvenile firesetters, the literature lacks empirically based classification systems. Existing typologies have been descriptive, arbitrarily segregate subtypes based on univariate characteristics, and lack empirical validation. In the present investigation, cluster analysis was used to develop a classification of juvenile firesetters based on both fire-specific and general individual and environmental variables associated to firesetting severity and recidivism. Participants included 240 firesetters aged 4 to 17 and primary caretakers who were referred to The Arson Prevention Program for Children. Findings indicate that juvenile firesetters are a heterogeneous group that can be empirically separated into conventional-limited, home-instability-moderate, and multi-risk-persistent firesetters. These subtypes differ on fire-specific characteristics, individual and environmental variables, and firesetting recidivism and general outcome. The implications of this classification system for conducting fire-risk assessments and implementing prevention and treatment strategies are also discussed. (Published Abstract)