Several theories attempt to explain how the name Lampasas came to be. The Texas Almanac states the word came from a Spanish word for lilies that are found in nearby streams. Another source states the word comes from the Spanish word Lampazos. Lampasas is a city in Lampasas County, Texas, United States. The population was 6,786 at the 2000 census. It is the seat of Lampasas County. Lampasas is part of the KilleenTempleFort Hood Metropolitan Statistical Area.