Election result for Wollondilly, New South Wales, Australia
A by-election was held for the New South Wales Legislative Assembly electorate of Wollondilly on 12 November 1938 because of the death of Mark Morton (United Australia).
Result.
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align:right;" | Total formal votes
! colspan="3" style="text-align:right;" | Informal votes
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
! colspan="6" style="text-align:left;" |Two-party-preferred result
 ;includeonly ;
Mark Morton (United Australia) died. ;/includeonly ;
References.
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