| Essex - Occupational Data | FIPS Code=07030 |
| 1970 | |
| Employed Population | 4195 |
| Professional - Technical - Kindred | 1208 |
| Non-Farm Manager - Administrator | 421 |
| Sales Worker | 287 |
| Clerical Worker | 629 |
| Craftsperson - Foreperson | 558 |
| Non-Transport Operative | 288 |
| Transport Operative | 91 |
| Non-Farm Laborer | 90 |
| Farmer - Farm Manager | 23 |
| Farm Laborer | 31 |
| Non-Private Service | 360 |
| Household Service | 77 |
| Occupation Not Reported | 132 |
| 1980 | 1990 | |
| Employed Population | 7077 | 8684 |
| Executive - Administrator | 882 | 1518 |
| Professional Speciality | 1621 | 2059 |
| Technicians - Related Support | 427 | 519 |
| Sales | 581 | 1212 |
| Administrative - Clerical | 1263 | 1452 |
| Private Household Service | 18 | 24 |
| Protective Service | 49 | 117 |
| Non-Household, Non-Protective Service | 639 | 117 |
| Natural Resources | 43 | 84 |
| Precision Production - Craft | 646 | 781 |
| Machine Operators | 479 | 386 |
| Mover | 217 | 194 |
| Labor | 212 | 221 |
| 1980 | 1990 | ||
| Per Cent of Working Population Employed in Town of Residence | 47.60 | 43.20 | |
| 1970 | 1980 | 1990 | |
| Unemployment Rate | 3.61 | 3.91 | 4.39 |