The Utah & Northern Railway is a defunct railroad that was operated in the Utah Territory and later in the Idaho Territory and Montana Territory in the western United States during the 1870s and 1880s. It was the first railroad in Idaho and in Montana. The line was acquired by a Union Pacific Railroad subsidiary, the Oregon Short Line, and is today operated by the Union Pacific Railroad as the Ogden Subdivision (Ogden to McCammon, Idaho), part of the Pocatello Subdivision (McCammon to Pocatello, Idaho), and the Montana Subdivision (Pocatello to Butte, Montana).