Despite the existence of Guidance and Counseling programme in schools for decades, schools in Kenya still experience students unrest, cases of drugs and substance abuse,irresponsible sexual behavior,poor social relationship among students and towards their teachers,these have been rampant in Siaya County,Kenya thus creating the gap between guidance and counseling and social adjustment of students. This is a study on the role of guidance and counseling on social adjustment of students in public secondary schools in Kenya, the findings are of great importance in improving the implementation and sustenance of guidance and counseling programme in schools with the aim of improving social adjustment of students.