- Aqua Clear
- Aqua Massage
- Aqua Systems
- Aqua Tech
- Aquarium
- Aquatic Creations
- Aquatic Rehabilitation
- Aquatic Rehabilitation Sport Medical & Hand Center
- Aquent
- Aquent Partners
- Ar
- ARA Services
- Arab Termite & Pest Control
- Arabica Coffee House
- Aramark Corporation
- Aramark Sports & Entertainment
- Aramark Uniform Service
- Arbon Equipment Corporation
- Arbonne International
- Arbor
- Arbor Associates
- Arbor Career Center
- Arbor Glen Apartments
- Arbors
- Arbors Apartments
- Arbour Counseling Services
- Arby's
- Arc of Chemung County
- ARC Thrift Store
- Arcade
- Arcade Barber Shop
- Arcadia
- Arcadis
- Arcadis Geraghty & Miller
- Arch Paging
- Arch Wireless
- Arch Wireless Holdings
- Archadeck
- Archer Western Contractors