Before you buy your home in new castle County, de or rent that new castle County apartment, check out the local schools in your new new castle County, Delaware neighborhood. Our school finder includes public and private elementary schools, middle schools and high schools, as well as colleges and universities in new castle County. Here you can find important information about new castle County schools such as addresses, enrollment, staffing and student demographics. new castle County, Delaware school information made easy with AOL Real Estate. Start browsing new castle County cities/towns today by clicking one of the links below.