Rolla (/ˈrɒlə/) is a city in and the county seat of Phelps County, Missouri, United States. The population in the 2010 United States Census was 19,559. Rolla is located approximately midway between St. Louis and Springfield along I-44. The Rolla, Mo Micropolitan Statistical area consists of Phelps County, Missouri.
Rolla is located at 37°56′56″N 91°45′47″W / 37.948831°N 91.763048°W / 37.948831; -91.763048. According to the United States Census Bureau, the city has a total area of 11.85 square miles (30.69 km), of which 11.83 square miles (30.64 km) is land and 0.02 square miles (0.05 km) is water. Running through the city is the divide line that separates the vast Missouri watershed (via the Little Piney and the Gasconade) from the substantially smaller Meremec watershed (via the Bourbeuse).
As of the census of 2010, there were 19,559 people, 7,574 households, and 3,765 families residing in the city. The population density was 1,653.3 inhabitants per square mile (638.3/km). There were 8,339 housing units at an average density of 704.9 per square mile (272.2/km). The racial makeup of the city was 86.71% White, 4.11% Black or African American, 0.43% Native American, 5.70% Asian, 0.09% Native Hawaiian or Pacific Islander, 0.41% from other races, and 2.56% from two or more races. Hispanic or Latino of any race were 2.62% of the population.
There were 7,574 households of which 25.7% had children under the age of 18 living with them, 35.2% were married couples living together, 10.7% had a female householder with no husband present, 3.8% had a male householder with no wife present, and 50.3% were non-families. 36.4% of all households were made up of individuals and 10.8% had someone living alone who was 65 years of age or older. The average household size was 2.24 and the average family size was 2.90.
The median age in the city was 26.2 years. 18.2% of residents were under the age of 18; 29.4% were between the ages of 18 and 24; 23.7% were from 25 to 44; 17.1% were from 45 to 64; and 11.6% were 65 years of age or older. The gender makeup of the city was 55.0% male and 45.0% female.
As of the census of 2000, there were 16,367 people, 6,514 households, and 3,543 families residing in the city. The population density was 1,448.7 per square mile (559.2/km²). There were 7,221 housing units at an average density of 639.2 per square mile (246.7/km²). The racial makeup of the city was 89.2% White, 2.92% African American, 0.46% Native American, 4.6% Asian, 0.12% Pacific Islander, 0.73% from other races, and 1.69% from two or more races. Hispanic or Latino of any race were 1.72% of the population.
There were 6,514 households out of which 26.2% had children under the age of 18 living with them, 41.0% were married couples living together, 10.6% had a female householder with no husband present, and 45.6% were non-families. 35.9% of all households were made up of individuals and 11.4% had someone living alone who was 65 years of age or older. The average household size was 2.20 and the average family size was 2.88.
In the city, the population was spread out with 20.1% under the age of 18, 25.3% from 18 to 24, 25.2% from 25 to 44, 16.4% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 28 years. For every 100 females, there were 112.1 males. For every 100 females age 18 and over, there were 114.2 males.
The median income for a household in the city was $26,479, and the median income for a family was $38,975. Males had a median income of $31,861 versus $19,625 for females. The per capita income for the city was $15,916. About 13.8% of families and 22.0% of the population were below the poverty line, including 22.3% of those under age 18 and 13.8% of those age 65 or over.
Rolla Missouri neighborhoods include: 12th, County Road 8110, Downtown, Elk Prairie, Fraternity, Holloway St, Johnson-Laird, Lane Springs, Oak Knoll, Oak Meadow, Pebblestone, Rolla, Timberline, Winchester-Newcastle