This study determined the prevailing ethical climate in State Universities and Colleges (SUCs) in Region XII and its relationship to the faculty's three mandated functions; including instruction, research and extension. The descriptive method of research utilizing the correlation analysis was used in this study. This was conducted in four SUCs in Region XII, namely: Cotabato City State Polytechnic College in Cotabato City, Sultan Kudarat State University (ACCESS) in Tacurong City, University of Southern Mindanao in North Cotabato, and Cotabato Foundation of Science and Technology in North Cotabato. The respondents were the 268 selected faculty members taken through random sampling method. The researcher-made questionnaire was used to gather the data pertaining to the ethical climate and faculty's trifocal functions. The findings generated: The prevailing ethical climate in professional values has the mean of 4.59 described as "excellent", work ethics is "excellent" with the mean of 4.79 and cultural values is also "excellent" with its mean of 4.52; the faculty productivity in instruction is "excellent" with its mean of 4.79, "poor" in research with the mean of 2.23 and "good" in extension with the mean of 3.06; The ethical climate in terms of professional ethics with.942 manifests very high positive relationship, work ethics with.897 denotes high positive relationship, and cultural values with 0.864 also show high positive relationship with faculty productivity in their trifocal functions. The study concluded that the ethical climate influenced the faculty productivity. The faculty professional ethics, work ethics and cultural values contributed significantly to the faculty productivity in their university trifocal functions.