The 1946 Glasgow Cathcart by-election was held on 12 February 1946. The byelection was held due to the death of the incumbent Conservative MP, Francis Beattie. It was won by the Conservative candidate John Henderson.

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Glasgow Cathcart by-election Glasgow Cathcart by-election, 1946 Glasgow Cathcart by-election Cathcart, 1946 Cathcart by-election, 1946 Glasgow Cathcart by-election {{Glasgow-stub