David Leonard Watts, Baron Watts (born 26 August 1951) is a British politician and life peer who served in the Blair and Brown governments as a Lord Commissioner of the Treasury from 2005 to 2010 and chaired the Parliamentary Labour Party as a backbencher from 2012 to 2015.

Watts was a Government Whip and Lord Commissioner of HM Treasury from 2008 to 2010.

On 15 March 2012, he was elected to succeed Tony Lloyd as the Chair of the Parliamentary Labour Party, a role he performed until he stood down to be replaced by John Cryer on 9 February 2015.

[4] On 23 October 2015, he was created Baron Watts, of Ravenhead in the County of Merseyside, for life.

He entered the House of Lords on 3 December 2015 continuing to sit under the Labour whip.