Waterloo is located in northeast Iowa. Waterloo is part of Black Hawk County. Waterloo has 61.39 square miles of land area and 1.84 square miles of water area. As of 2010-2014, the total Waterloo population is 68,392, which has shrunk 0.52% since 2000. The population growth rate is much lower than the state average rate of 5.19% and is much lower than the national average rate of 11.61%. Waterloo median household income is $41,461 in 2010-2014 and has grown by 21.62% since 2000. The income growth rate is much lower than the state average rate of 33.56% and is lower than the national average rate of 27.36%. Waterloo median house value is $101,900 in 2010-2014 and has grown by 55.81% since 2000. The house value growth rate is higher than the state average rate of 53.09% 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 Waterloo is much better than the state average in quality. The Waterloo area code is 319.