Washington is located in east Missouri. Washington is part of Franklin County. Washington has 9.34 square miles of land area and 0.53 square miles of water area. As of 2010-2014, the total Washington population is 13,982, which has grown 5.58% since 2000. The population growth rate is lower than the state average rate of 7.74% and is much lower than the national average rate of 11.61%. Washington median household income is $49,627 in 2010-2014 and has grown by 14.30% since 2000. The income growth rate is much lower than the state average rate of 25.91% and is much lower than the national average rate of 27.36%. Washington median house value is $153,700 in 2010-2014 and has grown by 52.78% since 2000. The house value growth rate is about the same as the state average rate of 52.06% 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 Washington is much better than the state average in quality. The Washington area code is 636.