Grantsville is located close to the center of West Virginia. Grantsville is between the Calhoun, Gilmer county. Grantsville has 0.44 square miles of land area and 0.03 square miles of water area. As of 2010-2014, the total Grantsville population is 634, which has grown 12.21% since 2000. The population growth rate is much higher than the state average rate of 2.52% and is higher than the national average rate of 11.61%. Grantsville median household income is $31,250 in 2010-2014 and has grown by 19.68% since 2000. The income growth rate is much lower than the state average rate of 40.01% and is lower than the national average rate of 27.36%. Grantsville median house value is $80,000 in 2010-2014 and has grown by 101.51% since 2000. The house value growth rate is much higher than the state average rate of 37.64% 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 Grantsville is worse than the state average in quality. The Grantsville area code is 304.