Business Links
Phoenix Chamber of Commerce
Scottsdale Chamber of Commerce
Carefree/Cavecreek Chamber of Commerce
Buckeye Valley Chamber of Commerce
East Valley Chambers of Commerce Alliance
Mesa Chamber of Commerce
Tempe Chamber of Commerce
Arizona Chamber of Commerce
Gilbert Chamber of Commerce
Glendale Chamber of Commerce
Peoria Chamber of Commerce
Chandler Chamber of Commerce
North Phoenix Chamber of Commerce
Northwest Valley Chamber of Commerce
Southwest Valley Chamber of Commerce
Wickenburg Chamber of Commerce
Scottsdale Convention and Visitors Bureau
Greater Phoenix Convention and Visitors Bureau
Better Business Bureau

Some significant corporate headquarters located in the Maricopa County

Motorsports Authentics
Amkor Technology
Arizona Republic
Banner Health Systems
Bashas' Supermarkets
Best Western
Cold Stone Creamery
Discount Tire Company
eFUNDS
Fender Musical Instruments
Fulton Homes
Giant Industries
Go Daddy
Insight Enterprises
Inter-Tel
John C. Lincoln Hospitals
Knight Transportation
Main Street Restaurant Group
Medicis Pharmaceutical Corporation
Mesa Airlines
Meritage Homes
MicroChip Technology
Mobile Mini
ON Semiconductor
Petsmart
Phelps Dodge
Ping Golf / Karsten Manufacturing
Pinnacle West Capital Corporation
Arizona Public Service
P.F. Chang's China Bistro
Poore Brothers
Rural/Metro
Salt River Project
Scottsdale Healthcare
Shamrock Foods
Swift Transportation Company
Taser International
Troon Golf
Viad Corporation

Companies with Large Presence in the Maricopa County

Amerco
U-Haul
American Express
Applied Materials
Bank of America
Boeing
Catholic Healthcare West
Countrywide Financial
Cox Communications
Dial Corporation
Henkel
Holsum Bakery
Freescale Semiconductor
General Dynamics 
Google
Home Depot
Honeywell International
J.P. Morgan Chase
Intel
Kroger
Marriott International
Medtronic
Motorola
Pulte Homes
Qwest Communications
Safeway
Southwest Airlines
Starwood Hotels & Resorts Worldwide
Target Corporation
USAA
Vanguard Group
Wal-Mart
Walgreen's
Wells Fargo