Blenheim is located in northeast South Carolina. Blenheim is part of Marlboro County. Blenheim has 0.65 square miles of land area and has no water area. As of 2010-2014, the total Blenheim population is 144, which has grown 5.11% since 2000. The population growth rate is much lower than the state average rate of 17.83% and is much lower than the national average rate of 11.61%. Blenheim median household income is $32,750 in 2010-2014 and has grown by 22.81% since 2000. The income growth rate is higher than the state average rate of 21.44% and is lower than the national average rate of 27.36%. Blenheim median house value is $75,000 in 2010-2014 and has grown by 103.25% since 2000. The house value growth rate is much higher than the state average rate of 44.99% 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 Blenheim is worse than the state average in quality. The Blenheim area code is 843.