Western Massachusetts is home to more than 30,500 businesses. Nearly 30,000 of these have less than 100 employees while more than 500 have workforces ranging from 100 - 10,000 personnel. Listed below are the region's largest employers, rated by workforce size.

Western Massachusetts

• Baystate Healh- 10,000; Springfield, MA - Health Care
• University of Massachusetts- 8,201; Amherst, MA - Universities & Colleges
• Massachusetts Mutual Life Ins.- 6,300; Springfield, MA and Enfield, CT- Financial Services
• Bank of America- 5,100; Springfield, MA and MetroHartford, CT - Financial Services
• Mercy Medical Center and Sisters of Providence Health System- 5,000 Springfield, MA - Health Care
• Big Y Foods, Inc.- 4,200; Springfield, MA - Supermarkets & Grocery Stores
• C & S Wholesale Grocers, Inc.- 1,500; Hatfield, MA - Grocery Merchant Wholesale
• Cooley Dickinson Hospital- 1,500; Northampton, MA - Health Care
• Yankee Candle- 3,700; S. Deerfield, MA - Candle Manufacturer  
• Hasbro Games- 1,400; East Longmeadow, MA - Game & Toy Manufacturer
• Smith College- 1,300; Northampton, MA - Universities & Colleges
• Monson Development Center- 1,200; Palmer, MA - Health Care
• Northeast Utilities- 1,200; Springfield, MA - Utilities
• Mt Holyoke College- 1,099; South Hadley, MA - Universities & Colleges
• Republican- 1000; Springfield, MA - Newspaper Publishers
• Holyoke Community College- 950; Holyoke, MA - Universities & Colleges
• Franklin Medical Center- 900; Greenfield, MA - Health Care
• Berry Tubed Products, Inc.- 800; Easthampton, MA - Plastics Bottle Mfg.
• Air Liquide America Corp.- 746; Palmer, MA - Surgical & Medical Instrument Mfg.
• Springfield College- 740; Springfield, MA - Universities & Colleges
• Lance Berneche Construction- 700; Chicopee, MA - General Contractors
• Amherst College- 650; Amherst, MA - Universities & Colleges
• US Veterans Medical Center- 600; Leeds, MA - Health Care
• Wing Memorial Hospital- 600; Palmer, MA - Health Care
• Western New England College- 570; Springfield, MA - Universities & Colleges
• Solutia, Inc.- 530; Springfield, MA - Chemical Merchant Wholesale
• Holyoke Hospital- 500; Holyoke, MA - Health Care
• U.S. Postal Service- 500; Springfield, MA - Mail Service

Knowledge Corridor

• United Technologies Corp- 26,400; Hartford, Ct - Manufacturer 
• The Hartford Financial Group- 12,100; Hartford, CT - Financial Services, Insurance 
• Baystate Health- 10,000; Springfield, MA - Hospital
• Aetna Inc- 7,200; Hartford, Ct - Financial Services, Insurance 
• University of Massachusetts- 8,200; Amherst, MA - Colleges & Universities
• Mercy Medical center and Sisters of Providence Health System- 5,000; Springfield, MA - Hospital 
• Hartford Hospital- 6,300; Hartford, Ct - Hospital
• Travelers- 6,200; Hartford, Ct - Financial Services, Insurance
• Bank of America-  5,100; Springfield, MA and MetroHartford, CT - Financial Services
• MassMutual Financial Group- 6,300; Springfield, MA  and Enfield CT- Financial Services
• Cigna- 4,300; Bloomfield, Ct - Financial Services, Insurance
• U.S. Postal Service- 4,200; Springfield, MA - Mail Service
• Big Y Foods, Inc.- 4,250; Springfield, MA - Supermarket & Grocery Stores
• Northeast Utilities- 4,150;  Berlin, Ct - Utilities
• University of Connecticut-  4,000; Storrs, Ct - Colleges & Universities
• St Francis Hospital & Medical Center- 3,900; Hartford, Ct - Hospital
• Yankee Candle- 3,700, S. Deerfield, MA - Candle Manufacturer
• ESPN- 3,000; Bristol, Ct - Media
• ABB, Inc.- 3,000; Windsor, Ct - Fossil and Nuclear Power Generation
• Cooley Dickinson Hospital- 1,725; Northampton, MA - Hospital
• Hasbro Games (Milton Bradley)- 1,700; E. Longmeadow, MA - Toy Manufacturer
• Holyoke Hospital- 1,320; Holyoke, MA - Hospital