United States
Region 1: Northeast
- Division 1: New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont)
- Division 2: Mid-Atlantic (New Jersey, New York, and Pennsylvania)
Region 2: Midwest (Prior to June 1984, the Midwest Region was designated as the North Central Region.)
- Division 3: East North Central (Illinois, Indiana, Michigan, Ohio, and Wisconsin)
- Division 4: West North Central (Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, and South Dakota)
- Region 3: South
- Division 5: South Atlantic (Delaware, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, Washington D.C., and West Virginia)
- Division 6: East South Central (Alabama, Kentucky, Mississippi, and Tennessee)
- Division 7: West South Central (Arkansas, Louisiana, Oklahoma, and Texas)
Region 4: West
- Division 8: Mountain (Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming)
- Division 9: Pacific (Alaska, California, Hawaii, Oregon, and Washington)
Time Zones
- First Circuit
- Second Circuit
- Third Circuit
- Fourth Circuit
- Fifth Circuit
- Sixth Circuit
- Seventh Circuit
- Eighth Circuit
- Ninth Circuit
- Tenth Circuit
- Eleventh Circuit
- DC Circuit
Canada
citation:http://www.cdc.gov/flu/weekly/regions2009-2010/images/hhsregions.jpg
1) Alberta
2) British Columbia British Columbia Interior
3) Ontario
4) Saskatchewan
- Carlton Trail Region
- East Central Saskatchewan
- Northern Saskatchewan
- Regina
- Saskatoon
- Palliser's Triangle
- Cypress Hills