According to the last United States Census, Rohnert Park had a population of 40,971 people in 2010. The population was divided into 15,808 households and 9,336 families with a population density of 5,846 people per square mile.
Of the households, 41.4% were opposite-sex married couples living together, 7.6% were unmarried opposite-sex couples living together, and .9% were same-sex married or partnered couples living together. 11.9% of the households had a single female head-of-house and 5.7% had a single male head-of-house. 30.6% of households had children under the age of 18, 26.4% were just individuals, and 8.7% had someone 65 years of age or older living alone. The average household size was 2.6 and the average family size was 3.1.
The age range of the population was split as follows: 20.9% of people were under the age of 18, 16.7% were between 18 and 24 years old, 26.9% were between 25 and 44, 26.1% were between 45 and 64, and 9.3% were 65 years old or older. The median age of the city was 33 years old.
In 2010, Rohnert Park’s racial makeup was as follows: 76.1% white residents, 22.1% Hispanic or Latino residents, 5.2% Asian residents, 1.9% black residents, 1% Native American residents, and .4% Pacific Islander residents. 9.7% of residents identified as an “other race” and 5.7% identified as two or more races.