Colorado became the 38th state of August 1, 1876 but did not hold its first general election for state officers until October 3rd. George Corning was sworn in as the state's first Treasurer on November 3rd.
Source for Popular Vote data: Colorado General Assembly. The Legislative Manual of the State of Colorado, Colorado General Assembly (https://archive.org/details/legislativemanua00thom/page/234/mode/2up?view=theater) (accessed 12 Dec 2023)