The school counseling profession is governed by national standards to promote the academic, personal, social, and career development of all students. There is an emphasis on outlining professional dispositions for school counselors. Yet, the personal values, beliefs, and attitudes that influence their interactions with students and the carrying out of national standards are not being assessed. The purpose of the study was to examine school counselors' beliefs about justice in the world, multicultural counseling knowledge, and multicultural counseling awareness in relation to their attitudes about social justice advocacy. The response rate was 6% and included 88 practicing, professional school counselors who were members of the American School Counseling Association. The participants completed the Belief in Just World Scale, Multicultural Counseling Knowledge and Awareness Scale, Social Justice Advocacy Scale, and a demographic questionnaire. Sequential multiple regression analysis indicated that the three variables in the study were not predictors of social justice advocacy attitudes of professional school counselors. However, according to the Pearson correlation, there was a statistically significant negative relationship between belief in a just world and multicultural counseling awareness. This suggests that participants who believe that people get what they deserve in life had less multicultural counseling awareness. Also, there was a statistically significant positive relationship between multicultural counseling knowledge and multicultural counseling awareness. The outcomes of the study suggest that future research should concentrate on expanding the empirical literature base in order to better understand the factors that impact school counselors' commitment to social justice advocacy for all students.