Gilliam is a city located in Caddo Parish Louisiana. With a 2020 population of 148, it is the 291st largest city in Louisiana and the 17478th largest city in the United States . Gilliam is currently declining at a rate of -1.33% annually and its population has decreased by -9.76% since the most recent census, which recorded a population of 164 in 2010. Gilliam reached it's highest population of in . Spanning over 2 miles, Gilliam has a population density of 74 people per square mile.
The average household income in Gilliam is $69,649 with a poverty rate of 4.46%. The median rental costs in recent years comes to - per month, and the median house value is $139,600. The median age in Gilliam is 57.5 years, 54.5 years for males, and 64.3 years for females.