The Canadian Mental Health Association Niagara (CMHA Niagara) is a not-for-profit, registered charity #13053 2955 operated by a volunteer Board of Directors, a General Membership, and a Program Advisory Committee. All groups are represented by consumers/family members, agency representatives, and the general public. Board meetings are held the third Thursday of every month. The current Board members are listed separately under "Board Information". Annual General Meetings are held in June. The amalgamated CMHA Niagara celebrated its first Annual General Meeting on June 20, 2002. 

CMHA Niagara is one of 34 CMHA branches in Ontario and over 100 branches in Canada. CMHA Niagara receives some of the following benefits from its membership with CMHA Ontario: the use of the Mental Health Association name, continuous mental health system updates, information-sharing, job ads, events listings, participation in the development of public education campaigns, provincial policy development and awareness campaigns, training for volunteers and staff, and group benefits reductions.

CMHA Niagara is involved with all mental health and related agencies in the region. The Branch is a flow-through agency for the Manic-Depressive Society of Niagara, Innovative Enterprises and the Family Support Network. CMHA Niagara is a lead agency on homelessness and mental illness for the Region of Niagara, Community Mental Health Services, Oak Centre, Gateway Housing Inc., Community Crisis Care of the Niagara Health System.

The Canadian Mental Health Association, Niagara Branch was incorporated June 1, 2001 as an amalgamation of the St. Catharines and District and Niagara South Branches. Services to the Niagara Region have been provided for over 35 years. Thanks to the dedicated work of a group of volunteers during a period of over two years the merger was realized. The merger came from careful consideration of the needs of the community, including the need for efficiencies and improved service.