^The range given is from the date the governor was confirmed by the Senate, or appointed by the President during a Senate recess, to the date the governor's successor was confirmed, unless noted.
^When Jayne absent from the territory, Territorial Secretary John Hutchinson acted as governor.[4]
^Jayne was nominated on March 23, 1861;[6] confirmed by the Senate on March 27;[7] and arrived in the territory around late May 1861.[4]
^John F. Potter was nominated on March 6, 1863,[9] and confirmed by the Senate on March 9,[10] but declined the post.[3] Edmunds was appointed on October 6, 1863, during a Senate recess,[3][11] and he accepted the appointment on October 17,[8] taking the oath of office on November 2.[3] He was nominated on January 7, 1864,[12] and confirmed by the Senate on February 2.[13]
^While Faulk was not in the territory, Territorial Secretary Solomon L. Spink acted as governor.[14]
^Faulk was appointed on August 4, 1866, during a Senate recess;[14][11] nominated on December 14, 1866;[16] and confirmed by the Senate on March 2, 1867.[17] He arrived in the territory on September 4, 1866.[14]
^Burbank was nominated on April 3, 1869;[20] confirmed by the Senate on April 5;[21] and arrived on the territory on April 29.[18] He was reconfirmed by the Senate on March 17, 1873.[22]
^Burbank resigned in the face of political pressure.[18]
^Pennington was nominated on December 15, 1873, for a term to begin in January;[25] confirmed by the Senate on December 18, 1873;[26] and arrived in the territory on January 29, 1874.[23]
^Howard was nominated on February 18, 1878;[29] confirmed by the Senate on March 12;[30] and arrived in the territory on April 12.[27]
^Ordway was nominated on May 14, 1880;[33] confirmed by the Senate on May 22;[34] and arrived in the territory on June 23.[31]
^Pierce was nominated on June 27, 1884,[37] and confirmed by the Senate on July 2.[38]
^Pierce resigned to avoid political conflict in a letter dated November 15, 1886, and was expected to remain in office until he could turn affairs over to his successor;[39] however, according to McMullin, since the confirmation process took so long, Territorial Secretary Michael L. McCormack acted as governor until Church arrived on February 17, 1887.[40]
^Church was nominated on December 14, 1886;[42] confirmed by the Senate on February 3, 1887;[43] and arrived in the territory on February 17, 1887.[40]
^Church resigned due to a change in the party in power, and submitted his resignation upon President Harrison's taking office,[44] though McMullin says it was dated March 9.[40] It is assumed it took effect when his successor took office, as Church was reportedly still performing his duties on March 13.[45]
^Mellette was nominated on March 12, 1889,[48] and confirmed by the Senate on March 13.[49]
