Globally, social workers have become increasingly aware that many young lives are impacted by loneliness and social isolation. However, little is known about evidence-based interventions that address loneliness and social isolation for people aged 15–24 years. This chapter explores the question, ‘What are social solutions and how do these create belonging and connection for young people who are experiencing loneliness and social isolation?’ Social solutions are any interpersonal relationships or interventions that increase a sense of belonging and connection. Four key themes that can help inform practice, policy, social action, and programs with young people are shared in this chapter: (1) loneliness and social isolation has no cultural, social, ecological, or religious boundaries and can harm young people’s general well-being and physical and mental health; (2) people aged 15–24 years are more likely to experience loneliness and social isolation than other age groups; (3) the literature shows social and family connection and school belonging are protective factors against loneliness and social isolation; and (4) growing connections, such as through mentoring programs, can help reduce loneliness and social isolation. The implications for young lives are that engaging social solutions within practice, policy, social action, and programs (such as peer and family connections, school belonging, mentoring, cultural, and religious groups and volunteering) may lead to increased life satisfaction and resilience and address loneliness. This chapter suggests that evidence-based, cost-effective social solutions are worth prescribing when working or engaging with young lives.