| AVERAGE SALARY BY INDUSTRY | Middlesex, Massachusetts | United States |
| Agriculture, Forestry, Fishing and Hunting | $17,220 | $24,135 |
| Mining, Quarrying, and Oil and Gas Extraction | $104,833 | $62,204 |
| Construction | $47,245 | $35,300 |
| Manufacturing | $72,166 | $42,158 |
| Wholesale Trade | $54,033 | $41,714 |
| Retail Trade | $24,864 | $21,666 |
| Transportation and Warehousing | $40,261 | $40,449 |
| Utilities | $81,009 | $62,996 |
| Information | $67,651 | $48,512 |
| Finance and Insurance | $73,610 | $50,584 |
| Real Estate and Rental and Leasing | $49,938 | $36,265 |
| Professional, Scientific, and Technical Services | $80,853 | $59,897 |
| Management of Companies and Enterprises | $90,268 | $61,392 |
| Administrative and Support and Waste Services | $30,983 | $23,873 |
| Educational Services | $44,825 | $37,346 |
| Health Care and Social Assistance | $45,394 | $33,234 |
| Arts, Entertainment, and Recreation | $21,603 | $21,042 |
| Accommodation and Food Services | $17,273 | $14,790 |
| Other Services | $27,472 | $22,627 |
| Public Administration | $65,682 | $51,719 |