Past research found that samples of K-12 public-school principals indicated receiving inadequate training to identify and address the factors contributing to youth violence. This phenomenon was detected in the beliefs of certain samples of public-school principals, but it remained unknown if these reports were isolated or if they were a commonly held belief of K-12 principals. The purpose of this study was to determine how K-12 public-school principals' rate the quality of training they have received to identify and address factors contributing to youth violence as well as to examine if differences in mean training ratings exist among groups of the independent variables, e.g., school size, school resource level and school location. The study utilized a quantitative causal-comparative design to examine naturally occurring groups of the independent variable that required no experimental manipulation to compare outcomes. Data were collected by a researcher created, online survey consisting of 3 multiple-choice questions and twenty-four four-point Likert scales. The sample for this study (n=394) were active K-12 public-schools employed in schools across the United States. RQ1 was analyzed using summary statistics and indicated a mean training rating of 2.0972. RQ2-RQ4 were analyzed using a Welch's ANOVA and indicated no statistically significant differences among the groups of the school size, school resource level, and school location variables. The findings imply both systemic and localized issues with the quality of training received by K-12 public-school principals. The field should consider adopting universal training requirements, supplementing academic coursework, developing focused professional development, and placing greater importance on collaboration. Future researchers should consider sampling a larger population, simplifying the survey instrument, and examining a school's overall abilities by examining the different roles involved in identifying and addressing risk factors contributing to youth violence. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]