| Census Division | Added 1984-901 | Added 1992 | Deleted 1992 | In MAs established in 1992 |
| Middle Atlantic | 1 | 5 | 3 | 0 |
| East North Central | 0 | 17 | 1 | 0 |
| West North Central | 2 | 9 | 1 | 0 |
| South Atlantic | 1 | 28 | 4 | 8 |
| East South Central | 2 | 7 | 8 | 0 |
| West South Central | 0 | 15 | 1 | 0 |
| Mountain | 4 | 6 | 0 | 0 |
| Pacific | 1 | 3 | 0 | 1 |
| Total | 122 | 90 | 182 | 9 |
1All but one of the 12 additions were in new areas
(exception: Harvey County, KS, added to the Wichita MSA).
2Both totals include Madison County, TN (Jackson MSA)