Hiller is an unincorporated community and census-designated place in Fayette County, Pennsylvania, United States.

[5] It is in the northeast corner of Luzerne Township, bordered to the east by Dunlap Creek, to the northeast by the borough of Brownsville, and to the northwest by the Monongahela River, which forms the Washington County line.

[4] As of the 2000 census,[7] there were 1,234 people, 523 households, and 357 families residing in the CDP.

29.3% of all households were made up of individuals, and 19.7% had someone living alone who was sixty-five years of age or older.

In the CDP, the population was spread out, with 20.4% under the age of eighteen, 7.2% from eighteen to twenty-four, 24.5% from twenty-five to forty-four, 23.0% from forty-five to sixty-four, and 24.9% who were sixty-five years of age or older.