Imperial is located in east Missouri. Imperial is part of Jefferson County. Imperial has 5.25 square miles of land area and 0.79 square miles of water area. As of 2010-2014, the total Imperial population is 4,630, which has grown 5.88% 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%. Imperial median household income is $55,135 in 2010-2014 and has grown by 11.24% 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%. Imperial median house value is $158,700 in 2010-2014 and has grown by 61.28% since 2000. The house value growth rate is higher than 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 Imperial is much better than the state average in quality. The Imperial area code is 636.