Thornwood is located in southeast New York. Thornwood is part of Westchester County. Thornwood has 1.11 square miles of land area and has no water area. As of 2010-2014, the total Thornwood population is 4,248, which has shrunk 28.96% since 2000. The population growth rate is much lower than the state average rate of 3.26% and is much lower than the national average rate of 11.61%. Thornwood median household income is $122,143 in 2010-2014 and has grown by 37.28% since 2000. The income growth rate is higher than the state average rate of 35.25% and is higher than the national average rate of 27.36%. Thornwood median house value is $574,800 in 2010-2014 and has grown by 63.43% since 2000. The house value growth rate is lower than the state average rate of 90.79% 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 Thornwood is much better than the state average in quality. The Thornwood area code is 914.