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Multiple Counties per ZIP Code

ZIP Codes often cross county lines (sometimes 3 or more counties). The Multiple Counties per ZIP Code (MCZ) file contains a ZIP Code, plus the possible counties in which the ZIP Code may cross over. It also has an estimated percentage of the ZIP Code which falls within that county.

This file is ideal for those applications where you need to know if a ZIP Code is entirely in one county or not, such as:

  • Tax calculations
  • Insurance rate calculations
  • HMO coverage area determination
  • Sales territory assignments
  • Fraud detection
This file is currently updated about every 2 months. The following fields are included in the data file:
  • ZIP Code
  • A Sequence Number (for prioritizing the counties within a ZIP Code [sequence 1 is the main county for the ZIP Code])
  • State Abbreviation
  • City
  • County
  • State FIPS Code
  • County FIPS Code
  • Percentage of the total ZIP Code that this county covers

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Clients

3COM Corporation
3M
A.C. Nielsen
ADP
Allied Van Lines
Allstate
Amana Appliances
American Cancer Society
American Express
America On-Line
American Greetings
American Medical Association
Apple Computer
Auburn University
Avery Dennison
Banc One
Bank of America
Bayer
Bell Atlantic
Benjamin Moore
BF Goodrich Aerospace
Blue Cross & Blue Shield
Boeing
Bombardier
Borden
Bose Corporation
Boston Globe
Boston University
BP Oil Co.
Braun Corporation
Brinks
Brookstone
Budget Rent a Car
Bushnell Optics
BMW
Campbell Soup Company
Cap Gemini Ernst & Young
CARE
Carfax
Carmax
CarsDirect.com
Castrol
Champion Athletic Products
Chase Manhattan Bank
Children's Miracle Network
Cigna
Cisco Systems
Citibank
Citigroup
Classmates.com
Colgate-Palmolive
Computer Associates
Conoco Phillips
Continental Airlines
Corel
Cornell University
Corning
CountryWide Home Loans
Craftmatic Corp.
CVS Pharmacy
Daimler Chrysler Corp.
Dave & Buster's
Dell Computer Corp.
Deloitte & Touche
Dept. of Defense
Dept. of Veteran Affairs
Dept. of Justice
DHL Worldwide Express
Digital River
Discover
Discovery Channel
Disneyland
Disney Online
Dole
Dollar General
Dow Chemical
Dow Jones
DuPont
Earthlink
eBay
EDS
Ericsson, Inc.
Ernst & Young
E*TRADE
Exxon
FedEx
Fidelity Investments
First Data
First Union
Ford
Fujitsu
GE Capital
Geico Direct
Gillette
Gingiss Formalwear
Golf Digest
Goody's Family Clothing
Goodyear
Great-West Life Ins.
GTE Laboratories
Handspring, Inc.
Harley-Davidson
Harte-Hanks
Hershey Foods
Hewlett-Packard
Hilton Hotels
Hollywood.com
Homes.com
Honeywell
Household Credit
Hughes
Humana
IBM
Ingersoll-Rand
Ingram Micro
Intel
Interstate Batteries
International Paper
Intuit
IRS
iWon.com
J.B. Hunt
Jantzen
JD Power
John Deere
John Hancock Mutual Life
Johnson & Johnson
JP Morgan Chase
JVC Corporation
Kinko's
KnightRidder.com
Korean Air
KPMG Peat Marwick
Lanier
Lego
Lennox Industries
Lens Express
Lexmark
Lockheed Martin
Louis Harris & Associates
Lowes
Loyola University
Lucent Technologies
Maersk
Magellan
Mail.com
Manpower
Mary Kay
Mattel
McDonalds
MCI
McKesson HBOC
MetLife
Metropolitan Museum of Art
Microsoft
Minnesota Twins
Moen
Money Store
Moore
Motorola
MSNBC
NASA
National Semiconductor
NBA
NCR
NEC
Neiman Marcus
Nestle
New York Life
New York Times
NY Stock Exchange
Nike
Northrop Grumman
Novell
Norwegian Cruise Lines
Oakley
Office Depot
Office Max
Ogilvy & Mather
Oracle Corporation.
Overnite Transportation
Owens Corning
PaineWebber
Panasonic
Pennzoil-Quaker State
Pentax
Pepsi Cola
Pergo
PerkinElmer
PetSmart.com
Pinkerton Security
Pirelli Tire
PPG
PriceWaterhouse Coopers
Procter & Gamble
Providian Financial
Purdue University
Quill Corporation
Raymond James Financial
Rayovac
RealNames.com
Revlon
Rockwell
Rodgers and Hammerstein
Roto-Rooter Corp.
Royal Caribbean Cruise Lines
Qualcomm
Saab
Safeway
Safety-Kleen Corp.
Saks Fifth Avenue
Samsung Electronics
Schlage Lock Company
Seagate
Sealy
Seattle Times
Sherwin-Williams
Siemens
Singer
SmithKline/Beecham
Sony
Sprint
St. Johns University
Standard & Poors
Staples
State of Oklahoma
State Street Bank
Steak -n- Shake
T.J. Maxx
Teac America
Telecheck
Tenet Healthcare
Texas Rangers
The Hartford
Thrifty Car Rental
Thule
Toro Irrigation
Toshiba
Toyota
Toys R Us
Traveler's Property & Casualty
Trump Casino Services
Turner Broadcasting
Tyson Foods
U.S. Army Corps of Engineers
U.S. Air Force
U.S. Census Bureau
U.S. Chamber of Commerce
U.S. Dept. of Labor
U.S. Dept. of Transportation
U.S. Geological Survey
U.S. Mint
U.S. Postal Service
U.S. Treasury
Union Carbide
Universal Studios
University of Florida
University of Kentucky
University of Miami
University of Michigan
UPS
USA Today
USDA
Verizon
Virginia Tech
Volvo
W.R. Grace & Co.
W. Simmons Mattress
Wall Street Journal
Walt Disney World
Washington Times
West Point
Western Union
Weyerhaeuser
Williams Energy
Wilson Sporting Goods
Winnebago
Xerox Corp.
Yale
Yamaha
Young & Rubicam
York International
Zales