Unitarian Univeralism grew from the union of two radical Christian groups: the Universalists, who organized in 1793, and the Unitarians, who organized in 1825. In North America, they joined to become the Unitarian Universalist Association (UUA) in 1961.
At about the same time, the Canadian Unitarian Council (CUC) formed to be the national organization to represent Canadians within the UUA. Most services to CUC member churches and fellowships were provided by the UUA. In 2002, the CUC took over the provision of most services to member organizations in Canada.
The Calgary Unitarians are a member congregation of the CUC.