Adelphi is located in south Ohio. Adelphi is part of Ross County. Adelphi has 0.27 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Adelphi population is 399, which has grown 7.55% since 2000. The population growth rate is much higher than the state average rate of 1.83% and is lower than the national average rate of 11.61%. Adelphi median household income is $31,364 in 2010-2014 and has has shrunk by 5.32% since 2000. The income growth rate is much lower than the state average rate of 19.27% and is much lower than the national average rate of 27.36%. Adelphi median house value is $74,600 in 2010-2014 and has shrunk by -7.80% since 2000. The house value growth rate is much lower than the state average rate of 24.98% 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 Adelphi is worse than the state average in quality. The Adelphi area code is 740.