Gilliam is located in northwest Louisiana. Gilliam is part of Caddo County. Gilliam has 2.00 square miles of land area and has no water area. As of 2010-2014, the total Gilliam population is 142, which has shrunk 20.22% since 2000. The population growth rate is much lower than the state average rate of 2.96% and is much lower than the national average rate of 11.61%. Gilliam median household income is $28,958 in 2010-2014 and has has shrunk by 1.42% since 2000. The income growth rate is much lower than the state average rate of 38.15% and is much lower than the national average rate of 27.36%. Gilliam median house value is $131,300 in 2010-2014 and has shrunk by -75.07% since 2000. The house value growth rate is higher than the state average rate of 65.18% 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 Gilliam is worse than the state average in quality. The Gilliam area code is 318.