Harrow was a constituency of the House of Commons of the UK Parliament 1885—1945 in Middlesex, a traditional county; it covered an area forming part of the north-west of today's Greater London. It returned one Member of Parliament (MP). The constituency was created for the 1885 general election, substantially reduced on the creation of more seats in 1918 and abolished for the 1945 general election. The 2023 Periodic Review of Westminster constituencies initially proposed recreating the constituency, with boundaries similar to that of Harrow West.

Boundaries

Members of Parliament

Election results

Elections in the 1880s

Elections in the 1890s

Ambrose is appointed Attorney-General of the Duchy of Lancaster, requiring a by-election. Ambrose resigned after being appointed as a Master in Lunacy, requiring a by-election.

Elections in the 1900s

Elections in the 1910s

General Election 1914–15: Another General Election was required to take place before the end of 1915. The political parties had been making preparations for an election to take place and by July 1914, the following candidates had been selected; Chamberlayne was nominated by the non-party Harrow Electors League

Elections in the 1920s

Elections in the 1930s

General Election 1939–40 Another General Election was required to take place before the end of 1940. The political parties had been making preparations for an election to take place and by the Autumn of 1939, the following candidates had been selected;

Elections in the 1940s