Youth political behaviour plays a crucial role in shaping the democratic system of a country. Several factors, such as socio-economic status, employment opportunities, and educational background, have been extensively studied in relation to their impact on youth political behaviour. However, there is a deficiency in systematic reviews specifically focusing on the influence of peers on youth political behavior. This article aims to address this gap by conducting a systematic review of relevant studies from the Web of Science, Scopus, SpringerLink, and ProQuest databases. In total, 30 studies were identified through comprehensive search terms such as “peer influence”, “youth”, “political knowledge”, and “political behavior”. Through this review, four key themes emerged: (1) political knowledge, (2) group discussion, (3) peer pressure, and (4) identity development. The findings highlight the significance of identity development and peer pressure as the most influential factors shaping youth political behaviour. By adhering to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, this review encompasses studies conducted in various countries without any geographical restrictions. Gaining a comprehensive understanding of how peers influence the political behaviour of youth can provide leaders and policymakers with crucial insights for encouraging knowledgeable peer networks.