List of United Kingdom Parliament constituencies (1918–1945) by region

This article lists the parliamentary constituencies in the United Kingdom that existed between the general elections of 1918 and 1945, organized by region. This period encompasses significant political and social changes, including the expansion of the electorate through reforms like the Representation of the People Act 1918, and the interwar years. The constituencies reflect the geographical distribution of voters and the political landscape of the time.

The list is structured to provide a comprehensive overview of the constituencies within each region of the UK. Each region's section would typically include a breakdown of the individual constituencies, potentially categorized by type (e.g., borough constituencies, county constituencies, university constituencies). It may also note any boundary changes or constituency name changes that occurred during this period.

The data presented in this list is important for historical and political research, allowing for analysis of voting patterns, political representation, and demographic changes across the United Kingdom during a formative period in its history. Sources for this information would typically include official parliamentary records, historical election data, and academic research on the period.

Note that boundary commissions regularly review constituency boundaries, so the list represents the constituencies as they existed between the specified election years.