There was a need to identify the conflict management styles of the tertiary school administrators in Iloilo and analyze their relation to self-concept and interpersonal values. The present descriptive-correlational research delved into this problem, using as subjects the 64 randomly selected tertiary school administrators in 17 private schools, five SUCs, and 11 DECS-supervised tertiary institutions in Iloilo. Independent variables considered were the subjects' educational qualifications, administrative experience, foreign travels, school type, enrollment size and faculty size. Self concept and interpersonal values were the moderator variables and subjects' conflict management styles the dependent variables. Data-gathering instruments were the Thomas Kilmann Conflict MODE based instrument, the SRA Survey of Interpersonal Values and Girdano and Everly's Self-concept test. Descriptive statistics employed were frequency distribution, means and standard deviations. Inferential statistical tools included the t-test, One-way Analysis of Variance and the Pearson's r. Significance level was set at .05 for two-tailed tests. The tertiary school administrators in the city and province of Iloilo whether taken as an entire group or classified as to certain categories, demonstrated high self-concept. Moreover, the administrators, whether taken as a group or classified as to certain categories held dominant the interpersonal value of Independence and showed a bias or a propensity to use the "collaborating" style in resolving conflicts. In terms of significant differences in the self-concept among the administrators, those connected with the DECS-supervised tertiary institutions had significantly lower self concept than those with the private schools and the SUCs. No significant differences were observed among the administrators in terms of their interpersonal values and their conflict management styles.