| Londonderry Town - Property Tax Rates | FIPS Code=25050 |
| Year | Effective Tax Rate |
| 1970 | 1.06 |
| 1972 | 1.28 |
| 1974 | 1.14 |
| 1978 | 1.12 |
| Year | Effective Tax Rate | Municipal Tax Rate | School Tax Rate | |
| 1980 | 1.23 | 0.27 | 0.96 | |
| 1982 | 1.16 | 0.25 | 0.91 | |
| 1983 | 0.88 | Not Available | Not Available | |
| 1985 | 0.96 | Not Available | Not Available | |
| 1987 | 1.05 | Not Available | Not Available | |
| 1988 | 0.89 | 0.20 | 0.69 | |
| 1989 | 1.01 | 0.20 | 0.81 |
| Year | Effective Tax Rate | Municipal Tax Rate | School Tax Rate |
| 1990 | 0.79 | 0.19 | 0.60 |
| 1991 | 0.87 | 0.21 | 0.66 |
| 1993 | 1.11 | 0.23 | 0.88 |
| 1995 | 1.29 | 0.25 | 1.04 |
| 1997 | 1.49 | 0.28 | 1.21 |