As of the census of 2000, there were 1,409people, 459 households, and 358 families residing in the city. The population density was 738.7people per square mile (284.8Square kilometers). There were 494 housing units at an average density of 259.0Square meters (99.9Square kilometers). Liberty Hill is a city in Williamson County, Texas, United States. The population was 1,409 at the 2000 census, and 1,491 in the 2005 census estimate. According to the United States Census Bureau, the city has a total area of 1.9square miles (5.0Square kilometers), of which, 1.9squaremiles (4.9Square kilometers) of it is land and 0.52% is water.