This research aims to examines the relationship between parental treatment styles and attachment styles among adolescent girls in Jeddah. A descriptive correlational design was employed. The sample consisted of 366 female students from intermediate and secondary schools. Two scales were used to collect data: Parental Treatment Styles Scale developed by Buri (1991) and translated by Al-Badareen and Ghaith (2013), the Attachment Styles Scale developed by Al-Qusayer and Al-Rebdi (2023).  The results showed a positive correlation between both permissive and democratic parental styles and secure attachment, whereas a negative correlation with insecure attachment styles. In contrast, the authoritarian parental style was positively associated with insecure attachment styles and negatively associated with secure attachment. The democratic parental style was the most prevalent, while secure attachment was the most common attachment style. The research recommends enhancing parental awareness of democratic parenting practices to promote secure attachment among adolescent girls.