Wilmington Manor is a census-designated place (CDP) in north-eastern New Castle County, Delaware, United States.

According to the United States Census Bureau, the CDP has a total area of 1.6 square miles (4.1 km2), all land.

The racial makeup of the CDP was 68.6% White, 15.5% African American, 0.5% Native American, 1.1% Asian, 0.0% Pacific Islander, 11.4% from other races, and 3.0% from two or more races.

There were 3,173 housing units at an average density of 1,954.1 per square mile (754.5/km2).

The racial makeup of the CDP was 79.33% White, 10.95% African American, 0.19% Native American, 0.85% Asian, 0.06% Pacific Islander, 6.69% from other races, and 1.92% from two or more races.