THE LACK OF EVALUATION RESEARCH ON DELINQUENCY PROGRAMS IS CITED. THE ROLE OF FEDERAL LEGISLATION IN JUVENILE CRIME REDUCTION IS NOTED, AND CONCEPTUAL ISSUES ASSOCIATED WITH PREVENTION ARE IDENTIFIED. DELINQUENCY PREVENTION PROJECTS ARE SYNTHESIZED ACCORDING TO CONTEXT, CLIENT IDENTIFICATION, INTERVENTION STRATEGIES, AND PROGRAM EVALUATION. LOGICAL LINKAGES BETWEEN ELEMENTS OF DELINQUENCY PREVENTION PROGRAMS ARE PROPOSED. ATTENTION IS PAID TO EXTERNAL LINKAGES, PROGRAM CONSTRAINTS, EARLY INTERVENTION VERSUS NONINTERVENTION, AND PREVENTION AS THE REINFORCEMENT OF POSITIVE ATTITUDES. POLITICAL AND ECONOMIC CONSTRAINTS THAT INHIBIT PROGRAM INITIATION AND EVALUATION AND OVER WHICH PROGRAM DIRECTORS HAVE NO CONTROL ARE DELINEATED. BECAUSE OF EVIDENCE SHOWING THAT MOST ADOLESCENTS PHASE OUT OF DELINQUENCY, THE ARTICLE RECOMMENDS THAT SPECIAL CONSIDERATION BE GIVEN TO THESE ADOLESCENTS MOST IN NEED OF SERVICES. THE IMPORTANCE OF COMBINED PROGRAM DESIGN, IMPLEMENTATION, EVALUATION, AND MODIFICATION IS EMPHASIZED. CHARTS AND NOTES ARE INCLUDED.