Under a Charter from the General Society of Mayflower Descendants, The Society of Mayflower Descendants in the State of Idaho wrote and adopted a constitution, dated Nov. 21, 1946 in the city of Lewiston, Idaho.  This was accomplished by Mr. Marcus J. Ware of Lewiston, Idaho.  The Governor General was unable to attend the organizational meeting in person but prepared and address that was delivered by phonograph recording.

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There were 25 Charter members.

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The Charter members were from both northern and southern Idaho.  Because of the distances involved as a statewide group, it was difficult for them to get together.  For many years, meetings were rotated between Lewiston and Boise.  Eventually, because most of the members now reside in the Boise area, the annual meetings are held in Boise.