| Topsham - Population Characteristics | FIPS Code=17060 |
| 1970 | 1980 | 1990 | |
| Population Density (Persons per Square Mile) | 40.35 | 45.12 | 19.30 |
| Total Population | 686 | 767 | 944 |
| Per Cent of Popualtion Born within Vermont | 77.26 | 70.52 | 54.20 |
| Number of Families | 157 | 205 | 260 |
| Per Cent of Population Aged 18 or Younger | 34.78 | 31.03 | 35.49 |
| Per Cent of Population Aged 18 to 64 | 48.99 | 58.54 | 60.28 |
| Per Cent of Population Aged 65 or Older | 16.22 | 10.43 | 10.38 |