UUA or Unitarian Universalist Association is a liberal religious association of Unitarian Universalist congregations.
UUA or Uua may also refer to:
Bugulma Airport's IATA code Ua (singer) or Uua, Japanese singer UUA, a pilot report code for an "urgent" message UUA, a codon for leucine United Utilities Australia or TRILITY, an Australian water utility, acquired by INCJ and others Uua Island, an island of New Caledonia