The Catholic Church in Norway is part of the worldwide Catholic Church. As of May 2014, there were over 151,000 registered Catholics in Norway. It is claimed there are many Catholics who are not registered with their personal identification number and who are not reported by the local church; the full number may be as high as 230,000, 70% of whom were born abroad. That constitutes about 5% of the population, making Norway the most Catholic country in Nordic Europe.

The Diocese of Oslo is an exempt Latin Church diocese of the Catholic Church located in the city of Oslo in Norway.