| Marshfield - Population Characteristics | FIPS Code=23045 |
| 1970 | 1980 | 1990 | |
| Population Density (Persons per Square Mile) | 44.91 | 55.09 | 31.00 |
| Total Population | 1033 | 1267 | 1331 |
| Per Cent of Popualtion Born within Vermont | 80.05 | 60.64 | 58.40 |
| Number of Families | 269 | 310 | 359 |
| Per Cent of Population Aged 18 or Younger | 35.95 | 33.07 | 28.02 |
| Per Cent of Population Aged 18 to 64 | 58.01 | 59.04 | 62.21 |
| Per Cent of Population Aged 65 or Older | 6.04 | 7.89 | 10.07 |