Columbia is located in southeast Pennsylvania. Columbia is part of Lancaster County. Columbia has 2.41 square miles of land area and 0.01 square miles of water area. As of 2010-2014, the total Columbia population is 10,399, which has grown 0.85% since 2000. The population growth rate is lower than the state average rate of 3.89% and is much lower than the national average rate of 11.61%. Columbia median household income is $43,410 in 2010-2014 and has grown by 34.04% since 2000. The income growth rate is about the same as the state average rate of 32.44% and is higher than the national average rate of 27.36%. Columbia median house value is $105,100 in 2010-2014 and has grown by 42.61% since 2000. The house value growth rate is much lower than the state average rate of 70.00% and is lower 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 Columbia is close to the state average in quality. The Columbia area code is 717.