Marshallberg is located in Carteret county North carolina with a geographic area of 0.6 square miles. The total population in Marshallberg is 412 with 64.6% male and 35.4% female. Children under age 5 represent 0.0% of the population, under age 18 equal 4.9% of the population and over age 65 is 22.1% of the population. The median household income is $113,611, per capita income is $40,342. There are a total of 174 housing units with 72.4% owner occupied. Education includes 15.5% of residents that are high school graduates and 36.8% with a bachelor's degree or higher. The average temperature in Marshallberg in the summer is 75 degrees, and in the winter 38 degrees.