 | 1896 | 1897 | 1898 |  |
Date | Country | Change |
| 1897 |  Turkiye | Titular Episcopal See of Parium was promoted as Titular Archiepiscopal See of Parium |
| 1897.02.12 |  Malawi | Apostolic Prefecture of Nyassa was promoted as Apostolic Vicariate of Nyassa |
| 1897.02.15 |  Argentina | Diocese of La Plata was established (from Metropolitan Archdiocese of Buenos Aires and became suffragan of Buenos Aires) |
| 1897.02.15 | Argentina | Diocese of Santa Fe was established (from Diocese of Paraná and became suffragan of Buenos Aires) |
| 1897.02.15 | Argentina | Diocese of Tucumán was established (from Diocese of Salta and became suffragan of Buenos Aires) |
| 1897.03.05 |  USA | Diocese of Kansas City, Kansas was renamed as Diocese of Leavenworth |
| 1897.03.21 |  Lebanon | Diocese of Tripoli (Greek-Melkite Rite) was established (became suffragan of Tyr) |
| 1897.04.06 | USA | Diocese of Fargo was established (from the suppressed Diocese of Jamestown and became suffragan of Saint Paul) |
| 1897.04.06 | USA | Diocese of Jamestown was suppressed (to establish Diocese of Fargo) |
| 1897.04.14 |  Uruguay | Diocese of Melo was established (from Diocese of Montevideo and became suffragan of Montevideo) |
| 1897.04.14 | Uruguay | Diocese of Montevideo was promoted as Metropolitan Archdiocese of Montevideo (with suffragan sees Melo and Salto and lost territory to establish Diocese of Melo and Diocese of Salto) |
| 1897.04.14 | Uruguay | Diocese of Salto was established (from Diocese of Montevideo and became suffragan of Montevideo) |
| 1897.05.08 | USA | Apostolic Vicariate of Arizona was promoted as Diocese of Tucson (became suffragan of Santa Fe) |
| 1897.06.28 |  Kiribati,  Nauru | Apostolic Vicariate of Gilbert Islands was established (from Apostolic Vicariate of New Pomerania) |
| 1897.07.06 |  Brazil | Metropolitan Archdiocese of São Sebastião do Rio de Janeiro lost territory to Diocese of Mariana and Diocese of Niterói |
| 1897.07.27 |  Solomon Islands | Apostolic Prefecture of British Solomons was established (from Apostolic Vicariate of New Pomerania) |
| 1897.07.28 |  Venezuela | Diocese of Zulia was established (from Diocese of Mérida and became suffragan of Caracas) |
| 1897.08.02 |  Bosnia and Herzegovina | Titular Episcopal See of Dulma was suppressed (to Diocese of Mostar–Duvno) |
| 1897.08.14 |  Greece | Apostolic Prefecture of Rhodes and adjacent islands was established |
| 1897.10.18 |  Guinea | Apostolic Prefecture of French Guinea was established (from Apostolic Vicariate of Senegambia and Apostolic Vicariate of Sierra Leone) |
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