There Are some People That Anindividual Keeps In Mind When Making a Purchase. Usually, Such Peopledisseminate Opinions and Other Individuals Are Pressured into Following Theirtrend, Becoming Associated With Them and Using Them As a Standard of Theirpurchase Decisions. Such People Are Known As Reference Groups and They Includeentertainment Figures, Sports Heroes, Political Leaders, Parents, Co-Workers,Teachers and Peers. This Paper Seeks to Contribute to the Existing Body of Theliterature on Reference Group Influence. Specifically, It Focuses on Peerinfluence Among Young Adults’ Products Purchase Decisions. a Convenience Sample of 101 Universitystudents Participated In This Study. the Results of Analysis of Variance Andt-Tests Indicated That There Is More Normative Influence For a Public Luxury(Sunglasses) Than For a Private Luxury (Cell Phone) and Private Necessity(Toothpaste). Informational Influence Was Also More For a Public Luxury Than Aprivate Necessity. Additionally, a Publicnecessity (Shoes) Had More Normative Influence Than a Private Luxury Andprivate Necessity As Well As a High Informational Influence Than Privatenecessity. Overall, These Results Demonstrated That the Influence of Peersvaries Across Various Product Categories.