Millville, Utah

The climate in this area has mild differences between highs and lows, and there is adequate rainfall year-round. According to the Köppen Climate Classification system, Millville has a marine west coast climate, abbreviated "CFB" on climate maps.[6]

As of the 2020 census,[7] there were 2,326 people, 663 households, and 553 families residing in the city.

At the 2000 census, there were 1,507 people, 395 households and 361 families residing in the city. The population density was 642.3 inhabitants per square mile (248.0/km²). There were 405 housing units at an average density of 172.6 per square mile (66.6/km²). The racial makeup of the city was 96.75% White, 0.40% Native American, 0.33% Asian, 1.59% from other races, and 0.93% from two or more races. Hispanic or Latino of any race were 2.12% of the population.

There were 395 households, of which 59.5% had children under the age of 18 living with them, 83.5% were married couples living together, 6.3% had a female householder with no husband present, and 8.4% were non-families. 7.6% of all households were made up of individuals, and 2.8% had someone living alone who was 65 years of age or older. The average household size was 3.82 and the average family size was 4.02.

39.2% of the population were under the age of 18, 12.8% from 18 to 24, 25.3% from 25 to 44, 18.2% from 45 to 64, and 4.6% who were 65 years of age or older. The median age was 23 years. For every 100 females, there were 102.3 males. For every 100 females age 18 and over, there were 103.3 males.

The median household income was $51,513 and the median family income was $52,813. Males had a median income of $32,969 and females $22,500. The per capita income was $13,977. About 2.7% of families and 3.1% of the population were below the poverty line, including 2.2% of those under age 18 and 6.8% of those age 65 or over.