Uxbridge and South Ruislip (UK Parliament constituency)

Uxbridge and South Ruislip
Borough constituency for the House of Commons
Boundary of Uxbridge and South Ruislip in Greater London.
County	Greater London
Electorate	71,954 (December 2010)
Current constituency
Created	2010
Member of parliament	Boris Johnson (Conservative)
Number of members	One
Created from	Uxbridge (most) Ruislip-Northwood (part)
Overlaps
European Parliament constituency	London

Uxbridge and South Ruislip is a constituency created in 2010 represented in the House of Commons of the UK Parliament by Boris Johnson, a Conservative, who has served as Foreign Secretary in the cabinet since 13 July 2016 and former Mayor of London from 2008 to 2016.

Most of the constituency came from that of Uxbridge which was first established under the Redistribution of Seats Act 1885, however parts of the seat came from Ruislip-Northwood and Hayes and Harlington, both of which had been carved out of the Uxbridge seat in 1950. The 1950 changes reflecting the growth in population across the area during the period from 1918, the previous national reorganisation of seats.

The Conservative party won in 2010 and 2015 by a margin of about 25%, and since 1970 the fourteen parliamentary elections in this constituency and its predecessor (the constituency of Uxbridge) were won by the Conservatives. The 2015 result gave the seat the 149th most marginal majority of the Conservative Party's 331 seats by percentage of majority.

In 2010 for the locally selected Conservative standing John Randall, born in Uxbridge, the one-party swing in the seat was 0.1% greater than that seen nationally — enough on the newly drawn constituency boundaries to provide 48.3% of the vote, and a majority of more than 11,000 votes. In the 2010 and 2015 elections three (of 8 and 13 candidates respectively) attained 5% of the vote or more, to retain their deposits.