| Williamstown - Occupational Data | FIPS Code=17085 |
| 1970 | |
| Employed Population | 724 |
| Professional - Technical - Kindred | 105 |
| Non-Farm Manager - Administrator | 43 |
| Sales Worker | 11 |
| Clerical Worker | 92 |
| Craftsperson - Foreperson | 142 |
| Non-Transport Operative | 109 |
| Transport Operative | 39 |
| Non-Farm Laborer | 29 |
| Farmer - Farm Manager | 21 |
| Farm Laborer | 24 |
| Non-Private Service | 62 |
| Household Service | 25 |
| Occupation Not Reported | 22 |
| 1980 | 1990 | |
| Employed Population | 903 | 1478 |
| Executive - Administrator | 62 | 193 |
| Professional Speciality | 72 | 95 |
| Technicians - Related Support | 25 | 49 |
| Sales | 76 | 131 |
| Administrative - Clerical | 141 | 294 |
| Private Household Service | 6 | 0 |
| Protective Service | 4 | 0 |
| Non-Household, Non-Protective Service | 69 | 235 |
| Natural Resources | 77 | 48 |
| Precision Production - Craft | 174 | 175 |
| Machine Operators | 113 | 110 |
| Mover | 63 | 79 |
| Labor | 21 | 69 |
| 1980 | 1990 | ||
| Per Cent of Working Population Employed in Town of Residence | 25.08 | 25.80 | |
| 1970 | 1980 | 1990 | |
| Unemployment Rate | 4.26 | 7.57 | 5.68 |