Ruislip, Northwood and Pinner is a constituency[n 1] in Greater London represented in the House of Commons of the UK Parliament since 2019 by David Simmonds, a Conservative.

Following their 2007 review of parliamentary representation in North London, the Boundary Commission for England created the new seat of Ruislip, Northwood and Pinner to deal with population changes.

Further to the 2023 Periodic Review of Westminster constituencies, which came into effect for the 2024 general election, the constituency is composed of: The Borough of Hillingdon ward of Ickenham and South Harefield was transferred to Uxbridge and South Ruislip, partly offset by minor expansions into neighbouring seats as a result of ward boundary changes.

[6] At the end of 2012 the unemployment rate in the constituency stood as 1.6% of the population claiming jobseekers allowance, compared to the regional average of 3.6%.

In terms of tenure 62.9%/65.2% of homes are owned outright or on a mortgage as at the 2011 census across the two London Boroughs.