Major Employers

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From international businesses to local entrepreneurs, social service agencies and public administration organizations, St. Charles County has an estimated 10,000 companies and groups working in the community.

 

Here is a list of the 10 largest for-profit employers and 10 largest not-for-profit employers based on reported full-time or FTE employees:


Largest For-Profits 2012

Rank
Company Location
Employment*
1
Citi O'Fallon 4,100
2
MasterCard Worldwide O'Fallon 1,953
3
True Manufacturing O'Fallon Withheld
4
Verizon Weldon Spring 1,400
5
General Motors Wentzville 1,321
6
MEMC Electronic Materials O'Fallon 1,000
6
The Boeing Company St. Charles 1,000
7
Ameristar Casino St. Charles 973
8
Client Services St. Charles 838
9
Enterprise Holdings Weldon Spring 722
10
AT&T Missouri St. Charles 600

*Based on reported full-time or FTE employees


Largest Not-For-Profits 2012

Rank
Company Location
Employment*
1
Ft. Zumwalt School District O'Fallon 2,597
2
Francis Howell School District Unincorporated County 2,069
3
Wentzville School District Wentzville 1,755
4
SSM St. Joseph Health Care St. Charles 1,248
5
St. Charles County Government St. Charles 999
6
Barnes-Jewish St. Peters Hospital St. Peters 900
7
SSM St. Joseph Hospital West Lake Saint Louis 895
8
St. Charles School District St. Charles 765
9
Lindenwood University St. Charles 550
10
City of St. Peters St. Peters 548

*Based on reported full-time or FTE employees