Kelly Services
| Formerly | 
 | 
|---|---|
| Company type | Public | 
| Nasdaq: KELYA (Class A) | |
| Industry | Professional services | 
| Founded | 1946 | 
| Founder | William Russell Kelly | 
| Headquarters | , U.S. | 
| Areas served | 
 | 
| Key people | Peter Quigley (president & CEO) | 
| Services | 
 | 
| Revenue | US$4.52 billion (2020) | 
| US$67 million (2015) | |
| US$−72 million (2020) | |
| Total assets | US$2.562 billion (2020) | 
| Total equity | US$1.203 billion (2020) | 
| Number of employees | 7,100 (2020) | 
| Website | kellyservices | 
Kelly Services, Inc. (formerly Russell Kelly Office Service and Kelly Girl Service, Inc.) is an American multinational office staffing company. The company places employees at all levels in various sectors including financial services, information technology, and law. Also, its professional services include human resource and management consulting, outsourcing, recruitment, career transition, and vendor management. Kelly Services was founded by William Russell Kelly in 1946 and is headquartered in Troy, Michigan.