New castle is located in Henry county Kentucky with a geographic area of 0.4 square miles. The total population in New castle is 1,050 with 46.5% male and 53.5% female. Children under age 5 represent 1.6% of the population, under age 18 equal 17.4% of the population and over age 65 is 34.1% of the population. The median household income is $33,438, per capita income is $20,414. There are a total of 465 housing units with 53.8% owner occupied. Education includes 38.5% of residents that are high school graduates and 15.9% with a bachelor's degree or higher. The average temperature in New castle in the summer is 76 degrees, and in the winter 36 degrees.