This study will find out the Peer Influence and Its Effect on the Academic Performance of the First Year College Student of Laguna, State Polytechnic University. Peer groups are composed of people with the same preferences. They are commonly at the same age and they tend to travel around and interact within the social aggregate. Members in a peer group commonly have the same interest and attitudes. This study aimed to determine the level of the Demographic Profile of the Students of Laguna State Polytechnic University. (1) Level of the Demographic Profile of the Students of Laguna State Polytechnic University in Terms of Age (2) Level of the Demographic Profile Terms of Gender (3) Level of Peer Influence in Terms of Vices. Descriptive method was used in this study to determine the Demographic Profile of the Students. Questionnaire in a form of checklist was used in gathering data. Weighted Mean, Standard Deviation and Regression were used to analyze and interpret the data. Based on the gathered data of this study, the findings of this study were the following: Level of the Demographic Profile of the Students o in Terms of age, gender was interpreted as Moderately Agree. While in terms of Vice was interpreted as Disagree. Proficient is the Performance of students in Mathematics in terms of First Semester Grading Grade. Finally, Peer Influence has a significant effect to the academic performance of the Students

Keywords : Peer, Vice, Grades,Gender.