| Cornwall - Property Tax Rates | FIPS Code=1020 |
| Year | Effective Tax Rate |
| 1970 | 1.93 |
| 1972 | 1.92 |
| 1974 | 1.81 |
| 1978 | 1.6 |
| Year | Effective Tax Rate | Municipal Tax Rate | School Tax Rate | |
| 1980 | 1.65 | 0.34 | 1.31 | |
| 1982 | 1.7 | 0.43 | 1.27 | |
| 1983 | 1.84 | Not Available | Not Available | |
| 1985 | 1.58 | Not Available | Not Available | |
| 1987 | 2 | Not Available | Not Available | |
| 1988 | 1.94 | 0.42 | 1.52 | |
| 1989 | 1.82 | 0.43 | 1.39 |
| Year | Effective Tax Rate | Municipal Tax Rate | School Tax Rate |
| 1990 | 1.98 | 0.58 | 1.4 |
| 1991 | 2.05 | 0.53 | 1.42 |
| 1993 | 1.84 | 0.28 | 1.56 |
| 1995 | 2.44 | 0.25 | 2.2 |
| 1997 | 2.5 | 0.25 | 2.25 |