Thornhill is located close to the center of Kentucky. Thornhill is part of Jefferson County. Thornhill has 0.05 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Thornhill population is 182, which has grown 4.00% since 2000. The population growth rate is lower than the state average rate of 8.45% and is much lower than the national average rate of 11.61%. Thornhill median household income is $86,250 in 2010-2014 and has grown by 2.28% 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%. Thornhill median house value is $266,400 in 2010-2014 and has grown by 41.03% since 2000. The house value growth rate is about the same as 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 Thornhill is close to the state average in quality.