This study examines the relationship between intensive social media use and the weakening of face-to-face community bonds among urban youth. Drawing on Putnam's concept of social capital and Granovetter's theory of tie strength, the paper investigates whether digital connectivity substitutes for, or complements, traditional forms of local social interaction. A mixed-methods design combining survey data (N = 240) with semi-structured interviews (n = 18) was employed among young adults aged 18-29 in a mid-sized urban setting. Findings indicate that while social media expands the quantity of weak ties, it is associated with a measurable decline in the frequency and depth of strong, geographically proximate relationships. The paper argues that this shift reconfigures community from a place-based structure into a networked, individualized one, with implications for collective action, neighborhood solidarity, and civic participation. The study concludes with recommendations for community institutions seeking to bridge digital and physical forms of belonging.