Date | Country | Change |
| 2002 |  Italy | Titular Episcopal See of Canosa was restored |
| 2002 |  Turkiye | Titular Archiepiscopal See of Myra (Greek-Melkite Rite) was demoted as Titular Episcopal See of Myra |
| 2002.01.05 |  Chile | Apostolic Vicariate of Araucanía was promoted as Diocese of Villarrica (lost territory to Diocese of Valparaíso and became suffragan of Concepción) |
| 2002.01.11 |  Ukraine | Archiepiscopal Exarchate of Donets’k–Kharkiv (Ukrainian Rite) was established (from Archiepiscopal Exarchate of Kyiv–Vyshhorod) |
| 2002.01.16 |  Brazil | Diocese of Feira de Santana was promoted as Metropolitan Archdiocese of Feira de Santana (with suffragan sees Barra, Barreiras, Bonfim, Irecê, Juazeiro, Paulo Afonso and Ruy Barbosa) |
| 2002.01.16 | Brazil | Diocese of Vitória da Conquista was promoted as Metropolitan Archdiocese of Vitória da Conquista (with suffragan sees Bom Jesus da Lapa, Caetité, Jequié and Livramento de Nossa Senhora) |
| 2002.01.18 | Brazil | Personal Apostolic Administration of São João Maria Vianney was established |
| 2002.02.06 |  Philippines | Territorial Prelature of Batanes and the Babuyan Islands was renamed as Territorial Prelature of Batanes (lost territory to Metropolitan Archdiocese of Tuguegarao) |
| 2002.02.11 |  Moldova,  Russia | Diocese of Tiraspol was suppressed (to Diocese of Saint Clement at Saratov) |
| 2002.02.11 | Russia | Apostolic Administration of Northern European Russia was promoted as Metropolitan Archdiocese of Mother of God at Moscow (with suffragan sees Saint Clement at Saratov, Saint Joseph at Irkutsk and Transfiguration at Novosibirsk) |
| 2002.02.11 | Russia | Apostolic Administration of Southern European Russia was promoted as Diocese of Saint Clement at Saratov (gained territory from the suppressed Diocese of Tiraspol and became suffragan of Mother of God at Moscow) |
| 2002.02.11 | Russia | Apostolic Administration of Eastern Siberia was promoted as Diocese of Saint Joseph at Irkutsk (gained territory from the suppressed Diocese of Vladivostok and became suffragan of Mother of God at Moscow) |
| 2002.02.11 | Russia | Apostolic Administration of Western Siberia was promoted as Diocese of Transfiguration at Novosibirsk (became suffragan of Mother of God at Moscow) |
| 2002.02.11 | Russia | Diocese of Vladivostok was suppressed (to Diocese of Saint Joseph at Irkutsk) |
| 2002.03.01 |  India | Diocese of Jhabua was established (from Diocese of Indore and Diocese of Udaipur and became suffragan of Bhopal) |
| 2002.03.27 | Philippines | Apostolic Vicariate of Palawan was renamed as Apostolic Vicariate of Puerto Princesa (lost territory to establish Apostolic Vicariate of Taytay) |
| 2002.03.27 | Philippines | Apostolic Vicariate of Taytay was established (from Apostolic Vicariate of Palawan) |
| 2002.03.27 | Ukraine | Apostolic Administration of Zakarpattia was promoted as Diocese of Mukačeve (became suffragan of Lviv) |
| 2002.04 |  France | Titular Episcopal See of Aléria was restored |
| 2002.04 | France | Titular Episcopal See of Mariana en Corse was restored |
| 2002.04 | France | Titular Episcopal See of Nebbio was restored |
| 2002.04 | France | Titular Episcopal See of Sagone was restored |
| 2002.04.10 | Russia | Apostolic Prefecture of Karafuto was renamed as Apostolic Prefecture of Yuzhno Sakhalinsk |
| 2002.04.20 |  Argentina | Apostolic Exarchate of Argentina (Greek-Melkite Rite) was established |
| 2002.04.30 |  Mongolia | Mission sui juris of Urga 庫倫 was promoted as Apostolic Prefecture of Ulaanbaatar |
| 2002.04.30 |  Nigeria | Apostolic Prefecture of Kontagora was promoted as Apostolic Vicariate of Kontagora |
| 2002.05.04 | Ukraine | Diocese of Kharkiv–Zaporizhia was established (from Diocese of Kamyanets-Podilskyi and Diocese of Kyïv–Žytomyr and became suffragan of Lviv) |
| 2002.05.04 | Ukraine | Diocese of Odessa–Simferopol was established (from Diocese of Kamyanets-Podilskyi and became suffragan of Lviv) |
| 2002.05.16 |  Afghanistan | Mission sui juris of Afghanistan was established |
| 2002.05.21 |  USA | Diocese of Saint Peter the Apostle of San Diego (Chaldean Rite) was established (from Diocese of Saint Thomas the Apostle of Detroit and without ecclesiastical province) |
| 2002.06.28 | India | Diocese of Chingleput was established (from Metropolitan Archdiocese of Madras and Mylapore and became suffragan of Madras and Mylapore) |
| 2002.07.16 | Italy | Territorial Abbacy of Subiaco lost territory to Diocese of Anagni–Alatri, Diocese of Palestrina and Diocese of Tivoli |
| 2002.07.31 | Brazil | Territorial Abbacy of Claraval was suppressed (to Diocese of Guaxupé) |
| 2002.10.11 | India | Metropolitan Archdiocese of Gandhinagar was established (from Diocese of Ahmedabad and with suffragan sees Ahmedabad, Baroda and Rajkot) |
| 2002.10.11 |  Mauritius | Apostolic Vicariate of Rodrigues was established (from Diocese of Port-Louis) |
| 2002.11.06 | Nigeria | Diocese of Auchi was established (from Metropolitan Archdiocese of Benin City and became suffragan of Benin City) |
| 2002.11.09 | Brazil | Diocese of Patos de Minas lost territory to Metropolitan Archdiocese of Uberaba |
| 2002.11.13 | Brazil | Territorial Prelature of Coxim was promoted as Diocese of Coxim |
| 2002.12.05 |  Kenya | Diocese of Nyahururu was established (from Metropolitan Archdiocese of Nyeri and became suffragan of Nyeri) |
| 2002.12.06 | Italy | Archdiocese of Manfredonia–Vieste was renamed as Archdiocese of Manfredonia–Vieste–San Giovanni Rotondo |
| 2002.12.07 | Philippines | Diocese of Novaliches was established (from Metropolitan Archdiocese of Manila and became suffragan of Manila) |
| 2002.12.07 | Philippines | Diocese of Parañaque was established (from Metropolitan Archdiocese of Manila and became suffragan of Manila) |
| 2002.12.08 | France | Metropolitan Archdiocese of Aix was demoted as Archdiocese of Aix (became suffragan of Marseille) |
| 2002.12.08 | France | Metropolitan Archdiocese of Albi was demoted as Archdiocese of Albi (became suffragan of Toulouse) |
| 2002.12.08 | France | Metropolitan Archdiocese of Auch was demoted as Archdiocese of Auch (became suffragan of Toulouse) |
| 2002.12.08 | France | Metropolitan Archdiocese of Avignon was demoted as Archdiocese of Avignon (became suffragan of Marseille) |
| 2002.12.08 | France | Metropolitan Archdiocese of Bourges was demoted as Archdiocese of Bourges (became suffragan of Tours) |
| 2002.12.08 | France | Metropolitan Archdiocese of Chambéry–Saint-Jean-de-Maurienne–Tarentaise was demoted as Archdiocese of Chambéry–Saint-Jean-de-Maurienne–Tarentaise (became suffragan of Lyon) |
| 2002.12.08 | France | Diocese of Clermont was promoted as Metropolitan Archdiocese of Clermont (with suffragan sees Le Puy-en-Velay, Moulins and Saint-Flour) |
| 2002.12.08 | France | Diocese of Dijon was promoted as Metropolitan Archdiocese of Dijon (with suffragan sees Sens, Autun, Nevers and Mission de France) |
| 2002.12.08 | France | Archdiocese of Marseille was promoted as Metropolitan Archdiocese of Marseille (with suffragan sees Aix, Avignon, Ajaccio, Digne, Fréjus–Toulon, Gap and Nice) |
| 2002.12.08 | France | Diocese of Montpellier was promoted as Metropolitan Archdiocese of Montpellier (with suffragan sees Carcassonne, Mende, Nîmes and Perpignan–Elne) |
| 2002.12.08 | France | Diocese of Poitiers was promoted as Metropolitan Archdiocese of Poitiers (with suffragan sees Angoulême, La Rochelle, Limoges and Tulle) |
| 2002.12.08 | France | Metropolitan Archdiocese of Sens was demoted as Archdiocese of Sens (became suffragan of Dijon) |
| 2002.12.11 | Brazil | Diocese of Rio Preto was renamed as Diocese of São José do Rio Preto |
| 2002.12.19 | India | Diocese of Idukki (Syro-Malabar Rite) was established (from Diocese of Kothamangalam and became suffragan of Ernakulam–Angamaly) |
| 2002.12.19 | India | Diocese of Moovatupuzha (Syro-Malankara Rite) was established (from Diocese of Tiruvalla and became suffragan of Trivandrum) |
| 2002.12.27 |  Venezuela | Diocese of Acarigua–Araure was established (from Diocese of Guanare and became suffragan of Barquisimeto) |
