Wyo. Stat. § 7-5-303 (2026)

The district judge granting the petition to convene a state
grand jury shall impanel the state grand jury from a base jury
list for the state compiled by the supreme court. The district
court judge may specify that the base jury list for the state
not include the names of jurors from every county within the
state to limit juror expense and inconvenience of travel. A
state grand jury shall be composed of twelve (12) persons, but
not more than one-half (1/2) of the members of the state grand
jury shall be residents of any one (1) county. The members of
the state grand jury shall be selected by the court in the same
manner as jurors of county grand juries and shall serve for one
(1) year following selection unless discharged sooner by the
district judge.