Greenock by-election may refer to one of six by-elections for the British House of Commons constituency of Greenock, in Renfrewshire, Scotland:
Greenock by-election, 1845 1878 Greenock by-election Greenock by-election, 1884 1936 Greenock by-election 1941 Greenock by-election 1955 Greenock by-election
See also
Greenock (UK Parliament constituency)