New Castle County

New Castle County is a county in Delaware, United States. The population in New Castle County was 575,494 in 2022. The median age in New Castle County was 38.8 in 2021. The median income in New Castle County was $39,512 in 2021. The unemployment rate in New Castle County was 3.6% in 2023. The percentage of people with obesity in New Castle County was 34.6% in 2021. The percentage of people who binge drink in New Castle County was 15.6% in 2021. The percentage of people who smoke in New Castle County was 13.8% in 2021.