Millville is located on the southeast side of Cache Valley in northern Utah and is bordered by Providence to the north, Logan to the northwest, and Nibley to the southwest.

According to the United States Census Bureau, Millville has a total area of 2.1 square miles (5.5 km2), all land.

[4] The climate in this area has mild differences between highs and lows, and there is adequate rainfall year-round.

[6] George White Pitkin built the first log home in Millville, before the settlement was organized or named.

As George White Pitkin was an educated man, he taught until a "proper" church and school were built.

Later, the Pitkin family built a two-story rock home with walls 2 feet (0.61 m) thick.