Hallsburg is a city in McLennan County, Texas, United States.

As of the census[3] of 2000, there were 518 people, 192 households, and 144 families residing in the city.

The population density was 61.7 inhabitants per square mile (23.8/km2).

There were 192 households, out of which 39.1% had children under the age of 18 living with them, 64.1% were married couples living together, 7.8% had a female householder with no husband present, and 24.5% were non-families.

22.9% of all households were made up of individuals, and 10.4% had someone living alone who was 65 years of age or older.