Centro Social Arco-Íris is a Portuguese Private Institution of Social Solidarity dedicated to promoting the well-being and quality of life of individuals, families, and communities. Guided by the principle of valuing each person, it provides social support and cultural activities from its location in Espinhel.

Its social services include a crèche for children up to 36 months, offering care for daily needs such as meals, rest, and hygiene, alongside educational, recreational, and movement activities. Home support helps older people, people with disabilities, and those affected by illness or other circumstances remain in their family environment. The day centre provides services intended to support older people in staying within their social and family communities. For the wider community, the institution offers orthopedic equipment rental and laundry services.

Arco-Íris also promotes cultural participation through a theatre group, library, publications, and community literary events. Its website shares institutional information, news, and ways to help or get involved. The organization welcomes inquiries by phone or email and operates in Espinhel, Portugal.