Serving the Communities of:
Billerica
Chelmsford
Dracut
Dunstable
Lowell
Pepperell
Tewksbury
Tyngsborough
Westford
NMCOG Comprehensive Economic Development
NMCOG CEDS Sections:
Updated 2007
| Company | Employees | Business | Founded |
| Raytheon | 8,000 | Defense Contractor | 1922 |
| Demoulas Supermarkets | 5,500 | Supermarket Chain | 1954 |
| BAE Systems | 5,200 | Defense and Aerospace | 1977 |
| The Lahey Clinic | 4,355 | Medical Services | 1923 |
| United Parcel Service | 2,300 | Package Delivery | 1907 |
| Teradyne | 1,850 | Testing Equipment | 1947 |
| Mitre | 1,829 | Tech Research, Consulting | 1958 |
| Emerson Hospital | 1,686 | Medical Services | 1911 |
| Lowell General Hospital | 1,680 | Medical Services | 1891 |
| M/A Com Inc. | 1,675 | Electronics | 1950 |
| Analog Devices Inc. | 1,650 | Electronic Circuits | 1965 |
| Verizon Communications | 1,600 | Telecom Services | 2000 |
| Sun Microsystems Inc. | 1,550 | Computer Servers, Storage | 1982 |
| Cisco Systems Inc. | 1,500 | Networking Equipment | 1984 |
| Kronos Inc. | 1,500 | Labor-Management Software | 1979 |
| Hannaford Bros. Inc. | 1,500 | Supermarket Chain | 1902 |
| Saints Memorial Medical Center | 1,497 | Medical Services | 1891 |
| Wal-Mart Stores | 1,350 | General Retail | 1962 |
| Home Depot | 1,300 | Building Products | 1978 |
In addition to the region's largest employers, community breakdowns are provided below:
Largest Employers by Community