them to a separate category. Hispanics/Latinos can be of any race. As of the 2020 United States census, there were 328,200 people by June 1, 2020 The population density was 2010 census As of the 2010 United States census, there were 287,085 people, 104,749 households, and 76,333 families residing in the county. The population density was . There were 109,282 housing units at an average density of . The racial makeup of the county was 62.2% white, 17.5% Black or African American, 14.4% Asian, 0.3% American Indian, 2.0% from other races, and 3.6% from two or more races. Those of Hispanic or Latino origin made up 5.8% of the population. In terms of ancestry, 17.7% were German, 13.9% were Irish, 10.6% were English, 7.0% were Italian, and 4.6% were American. Of the 104,749 households, 39.3% had children under the age of 18 living with them, 58.9% were married couples living together, 10.5% had a female householder with no husband present, 27.1% were non-families, and 21.9% of all households were made up of individuals. The average household size was 2.72, and the average family size was 3.20. The median age was 38.4 years. The median income for a household in the county was $103,273, and the median income for a family was $119,810. Males had a median income of $82,307 versus $59,128 for females. The per capita income for the county was $45,294. About 2.8% of families and 4.2% of the population were below the poverty line, including 4.6% of those under age 18 and 5.5% of those age 65 or over. 2000 census As of the census of 2000, there were 247,842 people, 90,043 households, and 65,821 families residing in the county. The population density was . There were 92,818 housing units at an average density of . The racial makeup of the county was 74.33% White, 14.42% Black, 0.24% Native American, 7.68% Asian, 0.04% Pacific Islander, 1.11% from other races, and 2.19% from two or more races. 3.02% of the population were Hispanic or Latino of any race. 15.1% were of German, 11.0% Irish, 9.3% English, 6.6% Italian and 5.7% American ancestry. There were 90,043 households, out of which 40.00% had children under the age of 18 living with them, 60.50% were married couples living together, 9.50% had a female householder with no husband present, and 26.90% were non-families. 20.80% of all households were made up of individuals, and