The National Federation of Colliery Officials was a trade union representing colliery workers in the United Kingdom who were not involved in manual labour. The federation was established in December 1919 by local unions of colliery officials, with the most important being the Northern Colliery Officials' Mutual Association, founded in 1914, and the Lancashire and Cheshire Colliery Officials' Association. It soon had six smaller affiliates, including Consett, the Forest of Dean Colliery Examiners', Overmen, and Shot Firers' Association, the Midland Mining Officials' Association, the Somerset Colliery Officials' Association, and Yorkshire.