Marshallton is located in east Pennsylvania. Marshallton is part of Northumberland County. Marshallton has 0.87 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Marshallton population is 1,340, which has shrunk 6.75% since 2000. The population growth rate is much lower than the state average rate of 3.89% and is much lower than the national average rate of 11.61%. Marshallton median household income is $38,750 in 2010-2014 and has grown by 67.22% since 2000. The income growth rate is much higher than the state average rate of 32.44% and is much higher than the national average rate of 27.36%. Marshallton median house value is $61,200 in 2010-2014 and has grown by 68.13% since 2000. The house value growth rate is about the same as the state average rate of 70.00% and is higher than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Marshallton is close to the state average in quality.