| Plainfield - Property Tax Rates | FIPS Code=23070 |
| Year | Effective Tax Rate |
| 1970 | 2.70 |
| 1972 | 2.39 |
| 1974 | 2.07 |
| 1978 | 2.21 |
| Year | Effective Tax Rate | Municipal Tax Rate | School Tax Rate | |
| 1980 | 2.36 | 0.83 | 1.53 | |
| 1982 | 1.81 | 0.79 | 1.02 | |
| 1983 | 2.01 | Not Available | Not Available | |
| 1985 | 2.20 | Not Available | Not Available | |
| 1987 | 2.65 | Not Available | Not Available | |
| 1988 | 2.29 | 0.87 | 1.42 | |
| 1989 | 2.34 | 0.94 | 1.40 |
| Year | Effective Tax Rate | Municipal Tax Rate | School Tax Rate |
| 1990 | 1.97 | 0.78 | 1.19 |
| 1991 | 2.12 | 0.87 | 1.25 |
| 1993 | 2.25 | 0.96 | 1.29 |
| 1995 | 2.23 | 0.86 | 1.37 |
| 1997 | 2.06 | 0.82 | 1.24 |