Timber Hills is a census-designated place (CDP) in Lebanon County, Pennsylvania, United States. The population was 329 at the 2000 census.GeographyTimber Hills is located at .According to the United States Census Bureau, the CDP has a total area of 0.8sqmi, of which, 0.8sqmi of it is land and 1.32% is water.DemographicsAs of the census of 2000, there were 329 people, 157 households, and 113 families residing in the CDP. The population density was 433.9 people per square mile (167.1/km²). There were 166 housing units at an average density of 218.9/sq mi (84.3/km²). The racial makeup of the CDP was 99.09% White, 0.30% Asian, 0.30% from other races, and 0.30% from two or more races. Hispanic or Latino of any race were 0.61% of the population.There were 157 households, out of which 15.9% had children under the age of 18 living with them, 68.8% were married couples living together, 2.5% had a female householder with no husband present, and 27.4% were non-families. 25.5% of all households were made up of individuals, and 15.9% had someone living alone who was 65 years of age or older. The average household size was 2.10 and the average family size was 2.47.