Myrtle Grove is a census-designated place (CDP) in New Hanover County, North Carolina, United States. The population was 8,875 at the 2010 census. It is part of the Wilmington Metropolitan Statistical Area.GeographyMyrtle Grove is located at .According to the United States Census Bureau, the CDP has a total area of 7.3sqmi.6.9 square miles of it is land and 0.4sqmi of it is water.DemographicsAs of the census of 2000, there were 7,125 people, 2,839 households, and 2,222 families residing in the CDP. The population density was 1,037.4 people per square mile (400.4/km²). There were 3,021 housing units at an average density of 439.9/sq mi (169.8/km²). The racial makeup of the CDP was 94.54% White, 3.55% African American, 0.17% Native American, 0.86% Asian, 0.11% Pacific Islander, 0.14% from other races, and 0.63% from two or more races. Hispanic or Latino of any race were 0.93% of the population.