The First Unitarian Church of Honolulu is the largest Hawaii-based congregation within the Unitarian Universalist Association. It is located at 2500 Pali Highway in the Nu'uanu Valley. The congregation was founded in 1952 as a lay fellowship. The fellowship was unusual for its time because its leadership consisted of women (Rosemary Mattson as chairwoman and Ruth Iams as program director) and because it made efforts to engage in interfaith dialogue with Jewish and Buddhist congregations in Honolulu.