Westfield (Scottish Gaelic: an t-Achadh Siar) is a small village of around 180 houses located in the parish of Torphichen in West Lothian, Scotland. The village was focused for many decades on a local paper mill that closed in the 1990s. Much of the housing in the village was or is owned by West Lothian Council but there have been recurrent plans for major new private housebuilding since the 1970s, as yet unfulfilled.