The Grand Council of Royal and Select Masters of Idaho was Chartered on 16 May, 1934, by the General Grand Council of Royal and Select Masters of the United States of America. The original four Councils were:
Idaho Council #1, Boise
Bannock Council #2, Pocatello
King Solomon Council #4, Payette
Menileck Council #5, Gooding
The Grand Council of Cryptic Masons of Idaho now consists of six Councils.