The Estrada de Ferro Oeste de Minas (EFOM) was a 2 ft 6 in narrow-gauge railway located in the southeastern Brazilian state of Minas Gerais. At its peak the railway's route totalled 775 km (482 mi). A portion of the railway still operates as a heritage railway, and one of the major stations is now Brazil's largest railway museum.

2 ft 6 in gauge railways are narrow gauge railways with track gauge of 2 ft 6 in. This type of rail was promoted especially in the colonies of the British Empire during the second half of the nineteenth century by Thomas Hall and Everard Calthrop.