St. Sebastian Catholic Youth Organization (CYO) basketball is the CYO program serving 3rd through 8th-grade children of Kentfield, Greenbrae, and Ross in Marin County, CA. We are affiliated with St. Sebastian Church, however, players do not have to attend church or be members of the congregation in order to participate in the basketball program.

The Catholic Charities CYO Athletics program has three main objectives:

• To encourage the social teachings of the Catholic Church promoting human dignity, service to others, and common good in our community.
• To provide as much participation as possible among all youth involved.
• To develop the concept of community through team sports.