Millville is a city in Cache County, Utah, United States. The population was 1,829 at the 2010 census. It is included in the Logan, Utah-Idaho (partial) Metropolitan Statistical Area.
Millville is located at 41°41′3″N 111°49′4″W / 41.68417°N 111.81778°W / 41.68417; -111.81778 (41.684131, -111.817779).
According to the United States Census Bureau, the city has a total area of 2.3 square miles (6.1 km²), all of it land.