- Advanced Regional Ctr-Ankle
- Advantage Employee Benefits
- Aeropostale
- Afera Care Hospice
- Affordable Computers Plus
- Affordable Decorating Solution
- Aflac
- Afterdark Productions
- Aid For Animals-Laws For Paws
- Albert Michael's Conservation
- Albert Michael's Gallery
- Albert's Siding & Roofing
- Alcoholics Anonymous
- Alechia's Unique House-Country
- Alfred's Electric
- All About You Inc
- All Occasion Limo Svc
- All Write
- Allegheny Aikikai Aikido
- Allegheny Anesthetists
- Allegheny Cut Stone Co
- Allegheny Mountains Convention
- Allegheny Orthotics
- Allegheny Pain Management PC
- Allegheny Synod
- Allegheny Travel & Cruise Ctr
- Allegheny Trucks Inc
