Data Sources:

• Columbus Business First 2010 Book of Lists, Greater Columbus Largest Employers
• Ohio Department of Job and Family Services, Bureau of Labor Market Information, Quarterly Census of Employment and Wages, 2009 (employment by industry division and employment growth)

For more information on sources

Definitions:

• Total employed: The number of persons employed part-time or full-time during a reporting period, including payroll workers, self-employed persons, unpaid workers in family enterprises, and domestics
• Industry sectors: The major divisions of employment within the North American Industry Classification System (NAICS), a common industrial classification system designed to facilitate economic analysis between the United States, Canada, and Mexico

Explanations and Caveats:

• Employers on the list of the largest employers are ranked according to the number of central Ohio full-time employees.

Update Status:

March 2012