- Party & Event Planning, Thiensville
- Passenger Vehicle Dealers, Thiensville
- Patio, Garden, Lawn & Outdoor Furniture, Thiensville
- Patio, Porch & Deck Builders, Thiensville - Installation, Repair & Maintenance Services
- Personal Care, Thiensville
- Personal Legal Services, Thiensville
- Personal Services, Thiensville
- Pet Care Services, Thiensville
- Pet Food & Supplies, Thiensville
- Pet Grooming & Boarding Services, Thiensville
- Pet Shops & Supplies, Thiensville
- Pets Stores & Pet Supplies , Thiensville
- Pharmacy & Drug Stores, Thiensville - Drugstore - Chemists
- Phone Companies - Long Distance Service, Thiensville
- Photo Retouchers, Thiensville
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- Photofinishing Laboratories, Thiensville
- Photography, Thiensville
- Physical Therapists, Thiensville - Physical Therapy
- Plastic Products, Thiensville
- Plumbers & Plumbing Contractors, Thiensville - Installation, Repair & Replace Services
- Pottery Retail, Thiensville
- Preschools, Thiensville
- Printing Services & Publishing Services, Thiensville
- Proctologists, Thiensville - Proctology Doctors, Physicians & Surgeons
- Product Rental & Leasing, Thiensville
- Product Repair Services, Thiensville
- Professional, Thiensville
- Professional Services, Thiensville
- Public Accountants, Thiensville
- Public Relations Consultants & Counselors, Thiensville
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