The Assembly of Catholic Bishops of Ontario is the association through which the Ontario Catholic Bishops collaborate on projects to proclaim, celebrate, and live the Good News of Jesus Christ in the province of Ontario.

The ACBO membership consists of all bishops from Ontario's fourteen Dioceses, one Ukrainian Eparchy, and one Slovak Eparchy.

ACBO Commissions and Committees support and coordinate activities related to Catholic Education, Chaplaincy in health care and correctional institutions, needs of the clergy, social justice, and diocesan insurance and benefits programs.

Family Life Education, as it is represented in Fully Alive, is intended to pass on a distinctively Catholic view of human life, sexuality, marriage, and family. Its goal is to complement the efforts of families and to provide support to parents.

The Social Affairs Commission of the ACBO offers notes for use in homilies and for discussion by Social Justice Groups in parishes. These notes have been authored by Fr. Lloyd Cummings of the Archdiocese of Kingston, Fr. Michael Ryan of the Diocese of London and Fr. Michael Basque of the Diocese of St. Catharines.