Lampasas County is part of the Killeen–Temple metropolitan statistical area.

[17] As of the census[23] of 2000, 17,762 people, 6,554 households, and 4,876 families were residing in the county.

About 21.90% of all households were made up of individuals, and 10.50% had someone living alone who was 65 years of age or older.

The median income for a household in the county was $36,176, and for a family was $41,395.

About 10.70% of families and 14.10% of the population were below the poverty line, including 18.70% of those under 18 and 14.80% of those 65 or over.