| Date | Country | Change |
| 1887 | Diocese of Eastern Bengal was renamed as Diocese of Dacca | |
| 1887 | Mission sui juris of Antofagasta was promoted as Apostolic Vicariate of Antofagasta | |
| 1887 | Apostolic Prefecture of Micronesia was promoted as Apostolic Vicariate of Micronesia | |
| 1887.01.07 | Diocese of Belleville was established (from Diocese of Alton and became suffragan of Chicago) | |
| 1887.01.11 | Apostolic Vicariate of Haut-Congo was established (from Apostolic Vicariate of Tanganyika) | |
| 1887.01.11 | Apostolic Vicariate of Unianyembé was established (from Apostolic Vicariate of Tanganyika) | |
| 1887.03.15 | Abbacy nullius of Saints-Nicholas-et-Benoît was promoted as Diocese of Monaco (without ecclesiastical province) | |
| 1887.05.05 | Diocese of Grafton was established (from Diocese of Armidale, gained territory from Diocese of Maitland and became suffragan of Sydney) | |
| 1887.05.05 | Diocese of Maitland lost territory to Diocese of Armidale and Diocese of Grafton | |
| 1887.05.10 | Diocese of Adelaide was promoted as Metropolitan Archdiocese of Adelaide (with suffragan sees Port Augusta and Victoria and lost territory to establish Diocese of Port Augusta) | |
| 1887.05.10 | Diocese of Brisbane was promoted as Metropolitan Archdiocese of Brisbane (with suffragan sees Rockhampton and Cooktown) | |
| 1887.05.10 | Apostolic Vicariate of Queensland was renamed as Apostolic Vicariate of Cooktown (became suffragan of Brisbane) | |
| 1887.05.10 | Apostolic Vicariate of Kimberley in Western Australia was established (from Diocese of Perth and became suffragan of Melbourne) | |
| 1887.05.10 | Diocese of Port Augusta was established (from Diocese of Adelaide and became suffragan of Adelaide) | |
| 1887.05.10 | Diocese of Sale was established (from Metropolitan Archdiocese of Melbourne and became suffragan of Melbourne) | |
| 1887.05.10 | Diocese of Wilcannia was established (from Diocese of Armidale, Diocese of Bathurst and Diocese of Goulburn and became suffragan of Sydney) | |
| 1887.05.10 | Apostolic Prefecture of Fiji Island was promoted as Apostolic Vicariate of Fiji Island | |
| 1887.05.10 | Diocese of Christchurch was established (from Diocese of Wellington and became suffragan of Wellington) | |
| 1887.05.10 | Diocese of Wellington was promoted as Metropolitan Archdiocese of Wellington (with suffragan sees Auckland, Christchurch and Dunedin and lost territory to establish Diocese of Christchurch) | |
| 1887.05.20 | Apostolic Vicariate of Kottayam (Syro-Malabar Rite) was established (from Archdiocese of Verapoly) | |
| 1887.05.20 | Apostolic Vicariate of Trichur (Syro-Malabar Rite) was established (from Archdiocese of Verapoly) | |
| 1887.06.07 | Archdiocese of Agra was promoted as Metropolitan Archdiocese of Agra (with suffragan sees Allahabad and Lahore) | |
| 1887.06.07 | Diocese of Allahabad lost territory to Metropolitan Archdiocese of Calcutta | |
| 1887.06.07 | Archdiocese of Bombay was promoted as Metropolitan Archdiocese of Bombay (with suffragan see Poona) | |
| 1887.06.07 | Archdiocese of Calcutta was promoted as Metropolitan Archdiocese of Calcutta (with suffragan sees Dacca and Krishnagar and gained territory from Diocese of Allahabad) | |
| 1887.06.07 | Diocese of Central Bengal was renamed as Diocese of Krishnagar (became suffragan of Calcutta) | |
| 1887.06.07 | Archdiocese of Madras was promoted as Metropolitan Archdiocese of Madras (with suffragan sees Hyderabad and Vizagapatam) | |
| 1887.06.07 | Archdiocese of Pondicherry was promoted as Metropolitan Archdiocese of Pondicherry (with suffragan sees Coimbatore, Mangalore, Mysore and Trichinopoly) | |
| 1887.06.07 | Diocese of Madurai was renamed as Diocese of Trichinopoly (became suffragan of Pondicherry) | |
| 1887.06.07 | Archdiocese of Verapoly was promoted as Metropolitan Archdiocese of Verapoly (with suffragan see Quilon) | |
| 1887.06.07 | Archdiocese of Colombo was promoted as Metropolitan Archdiocese of Colombo (with suffragan sees Jaffna and Kandy) | |
| 1887.07.06 | Apostolic Prefecture of Kafiristan e Kashmir was established (from Diocese of Lahore and became suffragan of Agra) | |
| 1887.07.11 | Diocese of Nagpur was established (from Diocese of Vizagapatam and became suffragan of Madras) | |
| 1887.08.02 | Apostolic Vicariate of Shaanxi 陝西 was renamed as Apostolic Vicariate of Northern Shaanxi 陝西北境 (lost territory to establish Apostolic Vicariate of Southern Shaanxi 陝西南境) | |
| 1887.08.02 | Apostolic Vicariate of Southern Shaanxi 陝西南境 was established (from Apostolic Vicariate of Shaanxi 陝西) | |
| 1887.08.02 | Diocese of Cheyenne was established (from Diocese of Omaha and became suffragan of Saint Louis) | |
| 1887.08.02 | Diocese of Concordia was established (from Diocese of Leavenworth and became suffragan of Saint Louis) | |
| 1887.08.02 | Diocese of Lincoln was established (from Diocese of Omaha and became suffragan of Saint Louis) | |
| 1887.08.02 | Diocese of Wichita was established (from Diocese of Leavenworth and became suffragan of Saint Louis) | |
| 1887.08.16 | Apostolic Vicariate of Colorado was promoted as Diocese of Denver (became suffragan of Santa Fe) | |
| 1887.11.16 | Apostolic Vicariate of Zanguebar was renamed as Apostolic Vicariate of Northern Zanguebar (lost territory to establish Apostolic Prefecture of Southern Zanguebar) | |
| 1887.11.16 | Apostolic Prefecture of Southern Zanguebar was established (from Apostolic Vicariate of Zanguebar) |
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