Columbia is located close to the center of Kentucky. Columbia is between the Adair, Casey, Taylor county. Columbia has 4.84 square miles of land area and 0.04 square miles of water area. As of 2010-2014, the total Columbia population is 4,792, which has grown 19.38% since 2000. The population growth rate is much higher than the state average rate of 8.45% and is much higher than the national average rate of 11.61%. Columbia median household income is $23,864 in 2010-2014 and has grown by 4.39% since 2000. The income growth rate is much lower than the state average rate of 28.72% and is much lower than the national average rate of 27.36%. Columbia median house value is $84,300 in 2010-2014 and has grown by 33.18% since 2000. The house value growth rate is lower than the state average rate of 40.25% 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 better than the state average in quality. The Columbia area code is 270.