Windsor (/ˈwɪnzə/) is a constituency[n 1] of the House of Commons in the UK Parliament represented since 2024 by Jack Rankin of the Conservative Party.

Post 2023 boundary changes, in local elections in the seat the major opposition party varies, with Labour strong in the Slough wards and Englefield Green, the Liberal Democrats in the town of Windsor itself, and independents in various villages.

That said, affluent villages and small towns along the River Thames and around the Great Park have continued to contribute to large Conservative majorities, including Wraysbury and Ascot.

The House of Commons reversed the decision of the previous Parliament and confirmed the scot and lot franchise.

George encouraged local landowner Peniston Portlock Powney to stand by paying him £2,500 from the King's personal account.

The borough had been loyal to the King's Pittite/Tory ministers in the late 18th and early 19th centuries, but became more favourable to the Whig interest after John Ramsbottom (MP 1810–1845) was elected.

Richardson-Gardner was a local landowner, who caused some animosity when following the 1868 general election he evicted tenants who did not support him at the polls.

Successive Conservative MPs, before the First World War, had considerable influence in the constituency; especially when they subscribed generously to local institutions such as a hospital.

The parliamentary borough was abolished by the Representation of the People Act 1918 and replaced by a county division named Windsor.

The constituency comprised the local government areas (as they existed in 1918): The new constituency comprised the bulk of the abolished Wokingham division, including Maidenhead and rural areas surrounding Windsor and Maidenhead, but excluding the Municipal Borough of Wokingham itself, and incorporating the abolished Borough, with the exception of Eton, which was added to the Wycombe division of Buckinghamshire.

This transferred to the Borough of Slough a small polling district from Surrey and another from Buckinghamshire to form Colnbrook and Poyle.

1 Following a local government boundary review which came into effect in May 2023,[9][10] the parts in the Borough of Slough will now comprise the following wards from the 2024 general election: As there were sometimes significant gaps between Parliaments held in this period, the dates of first assembly and dissolution are given.

Where the name of the member has not yet been ascertained or (in the 16th century) is not recorded in a surviving document, the entry unknown is entered in the table.

Note on sources: The information for the election results given below is taken from Cruickshanks et al. 1690–1715, Sedgwick 1715–1754, Namier and Brooke 1754–1790, Stooks Smith 1790–1832 and from Craig thereafter.

Whig and Radical candidates are classified separately until the formal establishment of the Liberal Party shortly after the 1859 United Kingdom general election.