List of all settlements:
- Adamsburg, Westmoreland
- Arnold, Westmoreland
- Arona, Westmoreland
- Avonmore, Westmoreland
- Bolivar, Westmoreland
- Bradenville, Westmoreland
- Calumet, Westmoreland
- Collinsburg, Westmoreland
- Colonial Beach, Westmoreland
- Crabtree, Westmoreland
- Delmont, Westmoreland
- Derry, Westmoreland
- Donegal, Westmoreland
- East Vandergrift, Westmoreland
- Export, Westmoreland
- Fellsburg, Westmoreland
- Grapeville, Westmoreland
- Greensburg, Westmoreland
- Harrison City, Westmoreland
- Herminie, Westmoreland
- Hostetter, Westmoreland
- Hunker, Westmoreland
- Hyde Park, Westmoreland
- Irwin, Westmoreland
- Latrobe, Westmoreland
- Laurel Mountain, Westmoreland
- Lawson Heights, Westmoreland
- Level Green, Westmoreland
- Ligonier, Westmoreland
- Lower Burrell, Westmoreland
- Loyalhanna, Westmoreland
- Madison, Westmoreland
- Mammoth, Westmoreland
- Manor, Westmoreland
- Millwood, Westmoreland
- Monessen, Westmoreland
- Montross, Westmoreland
- Mount Pleasant, Westmoreland
- Murrysville, Westmoreland
- New Alexandria, Westmoreland
- New Florence, Westmoreland
- New Kensington, Westmoreland
- New Stanton, Westmoreland
- North Belle Vernon, Westmoreland
- North Irwin, Westmoreland
- Norvelt, Westmoreland
- Oklahoma, Westmoreland
- Penn, Westmoreland
- Scottdale, Westmoreland
- Seward, Westmoreland
- Slickville, Westmoreland
- Smithton, Westmoreland
- South Greensburg, Westmoreland
- St. Vincent College, Westmoreland
- Sutersville, Westmoreland
- Vandergrift, Westmoreland
- Webster, Westmoreland
- West Leechburg, Westmoreland
- West Newton, Westmoreland
- Wyano, Westmoreland
- Youngstown, Westmoreland
- Youngwood, Westmoreland
- Yukon, Westmoreland