- A-Fn Machine Technology Inc
- A-K Tent Rental
- A-K Valley Chiropractic
- Advanced Learning Processes
- Advantage Auto Sales
- Affiliated Group Dentofacial
- Agostino Chiropractic Clinic
- Air Tech Radon Svc
- Albert L Bauer Plumbing Inc
- Alcoa Technical Ctr
- Alfred E Cecchetti Fabricating
- ALKAB Contract Mfg Inc
- All Pro Cleaning
- All Saints Church
- All Seasons Heating & Air Cond
- All Seasons Mini Mart
- All State Remodeling Co
- Alle Kiski Medical Ctr
- Alle Kiski Pavilion
- Alle-Kiski Careerlink
- Alle-Kiski Learning Ctr
- Alle-Kiski Medical Ctr
- Alle-Kiski Revitalization Corp
- Alle-Kiski Valley Senior Ctr
- Allegahmey River Terminals
- Allegheny Container Warehouse
- Allegheny County Health Dept
- Allegheny Gallery
- Allegheny Health & Rehab Ctr
- Allegheny Home Care
- Allegheny Kiski Postal Fed Cu
- Allegheny Twp Municipal Dept
- Allegheny Valley Chiropractic
- Allegheny Valley Church Of God
- Allegheny Valley Church-Christ
- Allegheny Valley Mental Health
