The Mid and West Lothian Labour Federation was a trade union representing coal and shale miners in the West Lothian area of Scotland. The union was founded in 1886 with 1,577 members, but by 1892 its membership had fallen to only 500, and it was renamed as the Amalgamated Miners and Manual Workers Union (AMMW). This new focus led to an immediate rise in membership, which reached 3,000 in 1893. Around 1920, the union became known as the West Lothian Mineworkers Union. In 1945, it was merged with other unions to form the Stirling and Lothians Area of the National Union of Mineworkers.