| Churches in Duncan, OK (57) | Restaurants in Duncan, OK (44) |
| Religious Organization in Duncan, OK (31) | Beauty Salons in Duncan, OK (26) |
| Insurance in Duncan, OK (26) | Oil & Gas Producers in Duncan, OK (24) |
| Machine Shops in Duncan, OK (23) | Automobile Dealers - Used Cars in Duncan, OK (21) |
| Beauty Shop in Duncan, OK (21) | Attorneys & Lawyers in Duncan, OK (20) |
| Physicians & Surgeons in Duncan, OK (19) | Schools in Duncan, OK (19) |
| Accountants in Duncan, OK (18) | Retreat Houses in Duncan, OK (17) |
| Automobile Repairing & Service in Duncan, OK (16) | Convenience Stores in Duncan, OK (15) |
| Ice Cream Parlors in Duncan, OK (15) | Loans in Duncan, OK (15) |
| Snack Products in Duncan, OK (14) | Banks in Duncan, OK (13) |
| Electric Contractors in Duncan, OK (12) | Oil Field Service in Duncan, OK (12) |
| Real Estate in Duncan, OK (12) | Automotive Repair & Service in Duncan, OK (11) |
| Dentists in Duncan, OK (11) | Used Automobiles & Cars in Duncan, OK (11) |
| Apartments in Duncan, OK (10) | Child Day Care Services in Duncan, OK (10) |
| Government Offices - County in Duncan, OK (10) | Legal Services in Duncan, OK (10) |
| Plumbing Contractors & Plumbers in Duncan, OK (10) | Real Estate Agent Construction in Duncan, OK (10) |
| Social Services in Duncan, OK (10) | Antiques - Dealers in Duncan, OK (9) |
| Child Care Service in Duncan, OK (9) | Elementary Secondary School in Duncan, OK (9) |
| Grocery - Retail in Duncan, OK (9) | Heating Contractors in Duncan, OK (9) |
| Oil Gas Field Services in Duncan, OK (9) | Real Estate Agent in Duncan, OK (9) |
| Tax Return Preparation & Filing in Duncan, OK (9) | Legal Services in Duncan, OK (8) |
| Auctioneers in Duncan, OK (7) | Cattle Ranching in Duncan, OK (7) |
| Concrete Contractor in Duncan, OK (7) | Gifts Shop in Duncan, OK (7) |
| Restaurant in Duncan, OK (7) | Roofing Contractors & Roofers in Duncan, OK (7) |
| Venetian Blinds - Cleaning in Duncan, OK (7) | Air Conditioning Contractors & Systems in Duncan, OK (6) |
| Automobile Body - Repairing & Painting in Duncan, OK (6) | Barber Shop in Duncan, OK (6) |
| Business Construction Services in Duncan, OK (6) | Clinics in Duncan, OK (6) |
| Concrete Contractors in Duncan, OK (6) | Glass - Auto Plate & Window & Etc in Duncan, OK (6) |
| Government Offices in Duncan, OK (6) | Hotels & Motels in Duncan, OK (6) |
| Insurance - Inspection & Audits in Duncan, OK (6) | Insurance Agent Broker in Duncan, OK (6) |
| Oil Field Supplies (Wholesale) in Duncan, OK (6) | Pest Control in Duncan, OK (6) |
| Pharmacies in Duncan, OK (6) | Social Service & Welfare Organizations in Duncan, OK (6) |
| Trucking Hauling Contractor in Duncan, OK (6) | Accounting Auditing Bookkeeping in Duncan, OK (5) |
| Amusement & Recreation in Duncan, OK (5) | Apartments in Duncan, OK (5) |
| Building Contractors in Duncan, OK (5) | Carpet & Rug Cleaners in Duncan, OK (5) |
| Carpet & Rug Dealers - New in Duncan, OK (5) | Cleaners in Duncan, OK (5) |
| Electrical Contractor in Duncan, OK (5) | Family Restaurant Diners in Duncan, OK (5) |
| Feed Store & Farm in Duncan, OK (5) | Foods - Carry Out in Duncan, OK (5) |
| Gift Shops in Duncan, OK (5) | Oil & Gas Exploration & Development in Duncan, OK (5) |
| Oil Operators in Duncan, OK (5) | Optometrists Od in Duncan, OK (5) |
| Plumbing Heating AC Contractor in Duncan, OK (5) | Service Stations - Gasoline & Oil in Duncan, OK (5) |
| Variety Store in Duncan, OK (5) | Wholesale Jewelry in Duncan, OK (5) |
| Women's Apparel - Retail in Duncan, OK (5) | Appraisers in Duncan, OK (4) |
| Auto Body Repair Painting in Duncan, OK (4) | Auto Parts & Machine Shop in Duncan, OK (4) |
| Barbers in Duncan, OK (4) | Carpet Upholstery Cleaning in Duncan, OK (4) |
| Check Cashing Service in Duncan, OK (4) | Civic Social Association in Duncan, OK (4) |
| Clothing - Retail in Duncan, OK (4) | Communication Equipment & Telephone Installation Servic in Duncan, OK (4) |
| Consultants - Business in Duncan, OK (4) | Dentists in Duncan, OK (4) |
| Department Stores in Duncan, OK (4) | Dry Cleaning Plant in Duncan, OK (4) |
| Fire Departments in Duncan, OK (4) | Florists - Retail in Duncan, OK (4) |
