The 1830 Illinois lieutenant gubernatorial election was held on 2 August 1830 in order to elect the lieutenant governor of Illinois. Democratic nominee Zadok Casey defeated Democratic-Republican nominee Rigdon Slocumb, candidate James Adams and candidate James M. Higbee.
General election.
On election day, 2 August 1830, Democratic nominee Zadok Casey won the election by a margin of 1,721 votes against his foremost opponent Democratic-Republican nominee Rigdon Slocumb, thereby gaining Democratic control over the office of lieutenant governor. Casey was sworn in as the 4th lieutenant governor of Illinois on 6 December 1830.
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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