Castalia is located in northeast Iowa. Castalia is between the Winneshiek, Fayette county. Castalia has 0.58 square miles of land area and has no water area. As of 2010-2014, the total Castalia population is 175, which has shrunk 0.00% 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%. Castalia median household income is $47,083 in 2010-2014 and has grown by 54.79% since 2000. The income growth rate is much higher than the state average rate of 33.56% and is much higher than the national average rate of 27.36%. Castalia median house value is $70,800 in 2010-2014 and has grown by 78.79% since 2000. The house value growth rate is higher than the state average rate of 53.09% and is much 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 Castalia is much better than the state average in quality. The Castalia area code is 563.