The 1880 Illinois lieutenant gubernatorial election was held on 2 November 1880 in order to elect the lieutenant governor of Illinois. Republican nominee John Marshall Hamilton defeated Democratic nominee and incumbent member of the Illinois Senate Lewis Baldwin Parsons and Greenback nominee Andrew Blainey Adair.
General election.
On election day, 2 November 1880, Republican nominee John Marshall Hamilton won the election by a margin of 41,194 votes against his foremost opponent Democratic nominee Lewis Baldwin Parsons, thereby retaining Republican control over the office of lieutenant governor. Hamilton was sworn in as the 21th lieutenant governor of Illinois on 3 January 1881.
Results.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
References.
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