The specifics of who may join Eastern Star is described on theAbout OES page:

    How to join: To inquire about membership, talk to a current member,
    or contact a local chapter.  To find chapters in your area, check out our
     Chapters page or contact  the  Grand Secretary.

    Petitions are carefully read, eligibility investigated and  election to
    membership must be by unanimous vote.  The Order strives to select
    persons of good moral and  spiritual quality who will work together
    in harmony to perform its objectives.

          Frequently Asked Questions:

      Q. Is the Order of the Eastern Star a secret society?
      A. No. Secret societies are underground and hard
          to find. We are easily found within the community
          but we enjoy a distinctive means of identifying each
          other. Only members are allowed in a closed meeting.

       Q. Can I afford membership In the Order of the Eastern Star?
       A. Yes. Financial position is not considered in the Order.
            Members come from all economic stations of life.

              Q. Is my religious faith allowed In the Order of the Eastern Star?
              A. Yes. Members of all religions may belong to the Order of the
                  Eastern Star.  We only require a belief in a Supreme Being.

       Q. Is the Order of' the Eastern Star time consuming?
       A. After your Initiation into our Order, you may attend
            as your time permits.

              Q. Is there any memory work?
              A. There is no mandatory memory work except the means
                   of making yourself known if you wish to visit a Chapter
                   or if you become an officer.

              Q. Is the Order patriotic and democratic?
              A. Yes. Members are taught an allegiance to preserve
                   the good of their country.