Garnavillo is located in east Iowa. Garnavillo is part of Clayton County. Garnavillo has 1.02 square miles of land area and has no water area. As of 2010-2014, the total Garnavillo population is 854, which has grown 13.26% since 2000. The population growth rate is much higher than the state average rate of 5.19% and is higher than the national average rate of 11.61%. Garnavillo median household income is $48,261 in 2010-2014 and has grown by 35.21% since 2000. The income growth rate is about the same as the state average rate of 33.56% and is higher than the national average rate of 27.36%. Garnavillo median house value is $82,900 in 2010-2014 and has grown by 28.53% since 2000. The house value growth rate is much lower than the state average rate of 53.09% and is much 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 Garnavillo is much better than the state average in quality. The Garnavillo area code is 563.