Riverside County is a county located in the southeastern part of the U.S. state of California, stretching from Orange County to the Colorado River, which is the border with Arizona. This county is part of the Greater Los Angeles Area. According to the U.S. Census Bureau, the county has a total area of 18,915 km² (7,303 mi²). 18,667 km² (7,207 mi²) of it is land and 248 km² (96 mi²) of it is water. The total area is 1.31% water. As of the census2 of 2000, there were 1,545,387 people, 506,218 households, and 372,576 families residing in the county. The population density was 83/km² (214/mi²). There were 584,674 housing units at an average density of 31/km² (81/mi²). The racial makeup of the county was 65.58% White, 6.24% Black or African American, 1.18% Native American, 3.69% Asian, 0.25% Pacific Islander, 18.69% from other races, and 4.37% from two or more races. 36.21% of the population were Hispanic or Latino of any race.