The Slovenian Catholic Church, or Catholic Church in Slovenia is part of the worldwide Catholic Church, under the spiritual leadership of the Pope in Rome. The 2018 Eurobarometer data shows 73.4% of Slovenian population identifying as Catholic that fell to 72.1% in the 2019 Eurobarometer survey. According to the Catholic Church data, the Catholic population fell from 78.04% in 2009 to 72.11% in 2019.

Slovenian Bishops' Conference is the supreme authority of the Roman Catholic Church in Slovenia, which combines all the bishops of Slovenian dioceses and archdioceses: Archdiocese of Ljubljana, Archdiocese of Maribor, Diocese of Koper, Diocese of Novo Mesto, Diocese of Celje, and the Diocese of Murska Sobota. SBC territory coincides with the borders of the Republic of Slovenia.