Plymouth is located in Luzerne county Pennsylvania with a geographic area of 1.1 square miles. The total population in Plymouth is 5,780 with 50.5% male and 49.5% female. Children under age 5 represent 8.1% of the population, under age 18 equal 24.2% of the population and over age 65 is 17.3% of the population. The median household income is $39,842, per capita income is $22,686. There are a total of 2,599 housing units with 48.6% owner occupied. Education includes 47.2% of residents that are high school graduates and 9.9% with a bachelor's degree or higher. The average temperature in Plymouth in the summer is 73 degrees, and in the winter 33 degrees.