Christianity; protestantism.
The Evangelical Lutheran Church of Norway is the official state church of Norway. Most people are nominal members though only about 10% of the population regularly attends church.
Christianity, specifically the Evangelical Lutheran Church of Norway, is the main religion in Norway. It is also known for its high percentage of atheists and agnostics among the population.
The capital city of Norway is Oslo.
There is no 'official' religion in the USA
Islam is the official religion in Afghanistan.
Theres no official religion in Tanzania. The government do not have religion, the citizen do have.
There is no official religion anywhere in the United States.
There is no Official religion in Puerto Rico.
It had no official religion except for trinitarian Christianity.
India does not have an official religion.
There is no official religion in Sweden since 1999