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| Real Estate in Northumberland, PA (3) | Septic Tanks Systems - Cleaning Repairing in Northumberland, PA (3) |
| Service Stations - Gasoline & Oil in Northumberland, PA (3) | Apartments in Northumberland, PA (2) |
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| Environmental & Ecological Services in Northumberland, PA (2) | General Merchandise - Retail in Northumberland, PA (2) |
| Oils - Fuel (Wholesale) in Northumberland, PA (2) | Personal Care Homes in Northumberland, PA (2) |
| Pharmacies in Northumberland, PA (2) | Pianos - Tuning Repairing & Refinishing in Northumberland, PA (2) |
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| Tax Return Preparation & Filing in Northumberland, PA (2) | Tire - Dealers - Retail in Northumberland, PA (2) |
| Air Conditioning Contractors & Systems in Northumberland, PA (1) | Appliances - Household - Major - Dealers in Northumberland, PA (1) |
| Asphalt & Asphalt Products - Manufacturers in Northumberland, PA (1) | Associations in Northumberland, PA (1) |
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| Automobile Dealers - New Cars in Northumberland, PA (1) | Automobile Detail & Clean - Up Service in Northumberland, PA (1) |
| Automobile Machine Shop Service in Northumberland, PA (1) | Automobile Racing Car Equipment in Northumberland, PA (1) |
| Barbers in Northumberland, PA (1) | Bars in Northumberland, PA (1) |
| Baseball Clubs in Northumberland, PA (1) | Beauty Shop in Northumberland, PA (1) |
| Beverages (Wholesale) in Northumberland, PA (1) | Bicycles - Dealers in Northumberland, PA (1) |
| Book Store in Northumberland, PA (1) | Business Services in Northumberland, PA (1) |
| Campgrounds in Northumberland, PA (1) | Candy & Confectionery - Retail in Northumberland, PA (1) |
| Car Washing & Polishing in Northumberland, PA (1) | Carpet & Rug Cleaners in Northumberland, PA (1) |
| Carpet & Rug Dealers - New in Northumberland, PA (1) | Cemeteries in Northumberland, PA (1) |
| Chimney & Fireplace Cleaning Build Rpr in Northumberland, PA (1) | Chiropractors in Northumberland, PA (1) |
| Clubs in Northumberland, PA (1) | Cocktail Lounges in Northumberland, PA (1) |
| Comic Books in Northumberland, PA (1) | Computer & Equipment Dealers in Northumberland, PA (1) |
| Concrete Pumping Service in Northumberland, PA (1) | Convenience Stores in Northumberland, PA (1) |
| Cruises in Northumberland, PA (1) | Dancing Instruction in Northumberland, PA (1) |
| Diamonds in Northumberland, PA (1) | Doors in Northumberland, PA (1) |
| Drug Store in Northumberland, PA (1) | Electric Contractors in Northumberland, PA (1) |
| Excavating Contractors in Northumberland, PA (1) | Excavation Contractor in Northumberland, PA (1) |
| Farms in Northumberland, PA (1) | Fishing Tackle - Dealers in Northumberland, PA (1) |
| Floor Laying Refinishing & Resurfacing in Northumberland, PA (1) | Floor Materials in Northumberland, PA (1) |
| Florists - Retail in Northumberland, PA (1) | Food Markets in Northumberland, PA (1) |
| Food Products (Wholesale) in Northumberland, PA (1) | Foods - Carry Out in Northumberland, PA (1) |
| Forgings (Manufacturers) in Northumberland, PA (1) | Fuel Management in Northumberland, PA (1) |
| Funeral Home in Northumberland, PA (1) | Funeral Plans (Pre - Arranged) in Northumberland, PA (1) |
| Furniture - Dealers in Northumberland, PA (1) | Garbage Collection in Northumberland, PA (1) |
| Gasoline & Oil - Wholesale in Northumberland, PA (1) | Gasoline Station Construction Service in Northumberland, PA (1) |
| Gifts Shop in Northumberland, PA (1) | Glass - Auto Plate & Window & Etc in Northumberland, PA (1) |
| Golf Courses - Public in Northumberland, PA (1) | Greenhouses in Northumberland, PA (1) |
| Hardware - Retail in Northumberland, PA (1) | Health Clubs Studios & Gymnasiums in Northumberland, PA (1) |
| Hobby & Model Constr Supplies - Retail in Northumberland, PA (1) | Home Builders in Northumberland, PA (1) |
