Do you have membership statistics for Unitarian Universalist congregations?
Membership statistics for Unitarian Universalist congregations are published annually by the Association. Data for the years 1961-2009 is available at Andover-Harvard Theological Library in this directory --
The most recent directory (2010) is available online on the UUA's website:
The Unitarians and the Universalists each published directories prior to the 1961 merger. If you want data prior to 1961, please see our online list of Directories of Churches and Ministers.