Meadowbrook is a census-designated place in Riverside County, California. Meadowbrook sits at an elevation of 1,621 feet (494 m). The 2010 United States census reported Meadowbrook's population was 3,185.

According to the United States Census Bureau, the CDP covers an area of 6.9 square miles (17.8 km2), 99.66% of it land and 0.34% of it water.

At the 2010 census Meadowbrook had a population of 3,185. The population density was 463.0 people per square mile (178.8/km2). The racial makeup of Meadowbrook was 2,034 (63.9%) White, 130 (4.1%) African American, 19 (0.6%) Native American, 51 (1.6%) Asian, 4 (0.1%) Pacific Islander, 798 (25.1%) from other races, and 149 (4.7%) from two or more races. Hispanic or Latino of any race were 1,765 persons (55.4%).

The census reported that 3,179 people (99.8% of the population) lived in households, 6 (0.2%) lived in non-institutionalized group quarters, and no one was institutionalized.

There were 982 households, 374 (38.1%) had children under the age of 18 living in them, 508 (51.7%) were opposite-sex married couples living together, 106 (10.8%) had a female householder with no husband present, 78 (7.9%) had a male householder with no wife present. There were 70 (7.1%) unmarried opposite-sex partnerships, and 2 (0.2%) same-sex married couples or partnerships. 228 households (23.2%) were one person and 91 (9.3%) had someone living alone who was 65 or older. The average household size was 3.24. There were 692 families (70.5% of households); the average family size was 3.83.