| Derby - Occupational Data | FIPS Code=19035 |
| 1970 | |
| Employed Population | 1109 |
| Professional - Technical - Kindred | 131 |
| Non-Farm Manager - Administrator | 121 |
| Sales Worker | 68 |
| Clerical Worker | 96 |
| Craftsperson - Foreperson | 222 |
| Non-Transport Operative | 129 |
| Transport Operative | 7 |
| Non-Farm Laborer | 17 |
| Farmer - Farm Manager | 89 |
| Farm Laborer | 39 |
| Non-Private Service | 123 |
| Household Service | 30 |
| Occupation Not Reported | 37 |
| 1980 | 1990 | |
| Employed Population | 1719 | 2084 |
| Executive - Administrator | 162 | 214 |
| Professional Speciality | 167 | 327 |
| Technicians - Related Support | 49 | 18 |
| Sales | 94 | 243 |
| Administrative - Clerical | 202 | 281 |
| Private Household Service | 18 | 6 |
| Protective Service | 32 | 7 |
| Non-Household, Non-Protective Service | 212 | 219 |
| Natural Resources | 153 | 145 |
| Precision Production - Craft | 271 | 233 |
| Machine Operators | 222 | 219 |
| Mover | 86 | 83 |
| Labor | 51 | 89 |
| 1980 | 1990 | ||
| Per Cent of Working Population Employed in Town of Residence | 37.42 | 40.7 | |
| 1970 | 1980 | 1990 | |
| Unemployment Rate | 5.8 | 9 | 6.55 |