William Lynch Coffey (born 24 May 1958) is a Scottish politician.
He has been a Scottish National Party Member of the Scottish Parliament for Kilmarnock and Loudoun since 2007.
Coffey studied at the University of Strathclyde where he obtained a degree in Computer Science.
He subsequently worked as Software Development Manager and latterly as a Quality and Risk Manager with Learning and Teaching Scotland before his election to the Scottish Parliament.
He has been a councillor on East Ayrshire Council.