Portsmouth is located in west Iowa. Portsmouth is between the Shelby, Harrison county. Portsmouth has 0.28 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Portsmouth population is 183, which has shrunk 18.67% 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%. Portsmouth median household income is $44,688 in 2010-2014 and has grown by 59.60% 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%. Portsmouth median house value is $89,300 in 2010-2014 and has grown by 47.12% since 2000. The house value growth rate is lower than the state average rate of 53.09% and is about the same as 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 Portsmouth is much better than the state average in quality. The Portsmouth area code is 712.