A 1948 by-election for the constituency of Glasgow Hillhead in the UK House of Commons was held on 25 November 1948, caused by the appointment as a Lord of Appeal in Ordinary of the incumbent Unionist MP James Reid. The result was a hold for the Unionist Party, with their candidate Tam Galbraith.
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; margin-right: 0.5em" | Majority
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
! style="text-align:right;" | Swing
Despite a clear victory for their party some Scottish Unionist MPs were reportedly disappointed by the result given that the recent Edmonton by-election had seen the Conservative Party's vote substantially increased while Labour's vote fell greatly. Commenting on the by-election, an editorial in "The Glasgow Herald" rejected and criticised this assessment, noting that there was a lower turnout and opining that it was a "a notable achievement" that Galbraith had increased the Unionist Party's majority by a third, given that, in the newspaper's view, he was "a young candidate succeeding one of the outstanding Unionist members of recent years."
Previous election.
! 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; margin-right: 0.5em" | Majority
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
! style="text-align:right;" | Swing
References.
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