Monroe is a city in Sevier County, Utah, United States. The population was 2,256 at the 2010 United States Census. The city is home to both Mystic Hot Springs and South Sevier High School.
Monroe is located in rural central Utah. According to the United States Census Bureau, the city has a total area of 3.5 square miles (9.2 km²), all of it land. Monroe is bordered by mountains on the east and south, and farmers’ fields to the west and north.
Monroe is home to naturally occurring hot springs with travertine deposits, a result of the Monroe-Red Hill geothermal system found along the Sevier fault. On the east side of town, hot water surfaces at a temperature of 168 °F and a rate of about 200 gallons per minute. A travertine mound has formed, known as the Monroe Mound. This deposit stretches one mile across, 200 yards wide, and a few hundred feet thick. There is another hot water source about a mile north of town called the Red Hill Hot Springs. It also surfaces at 168 °F, but at a rate of about 100 gallons per minute. The Red Hill mound is about one-third of a mile across, and deep red in color.
As of the census of 2000, there were 1,845 people, 707 households, and 480 families residing in the Monroe. The population density was 521.7 people per square mile (201.2/km²). There were 707 housing units at an average density of 199.9 per square mile (77.1/km²). The racial makeup of the city was 95.83% White, 0.22% African American, 1.41% Native American, 0.27% Asian, 0.11% Pacific Islander, 0.65% from other races, and 1.52% from two or more races. Hispanic or Latino of any race were 5.69% of the population.
There were 636 households out of which 37.3% had children under the age of 18 living with them, 69.5% were married couples living together, 8.2% had a female householder with no husband present, and 19.5% were non-families. 18.4% of all households were made up of individuals and 11.6% had someone living alone who was 65 years of age or older. The average household size was 2.90 and the average family size was 3.31.
In the city, the population was spread out with 32.2% under the age of 18, 8.1% from 18 to 24, 21.2% from 25 to 44, 23.0% from 45 to 64, and 15.4% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 90.0 males. For every 100 females age 18 and over, there were 89.0 males.
The median income for a household in the city was $34,907, and the median income for a family was $37,415. Males had a median income of $31,797 versus $17,981 for females. The per capita income for the city was $14,331. About 5.0% of families and 7.7% of the population were below the poverty line, including 7.4% of those under age 18 and 8.1% of those age 65 or over.