The study found that 51.6 percent stated they believed in God, and 40.3 percent said they believed in the central tenet of Christianity, that Jesus died on the cross for our sins, according to the Sentio survey carried out for newspaper Klassekampen.
Four out of ten claiming faith in Jesus is a clear increase from earlier surveys.
The study found that supporters of the Socialist Left Party were the least religious, even less so than voters for the farther left Red Electoral Alliance.
Apart from Christian Democrat voters, agrarian Center Party voters replied most in keeping with classical Lutheran faith.
The Norwegian Humanist Association Secretary General Kristin Mile, an opponent of the state church, said she had seen surveys that showed faith in a higher power being under 30 percent in Norway, and felt 51 percent was not very high either.
"There is a small percentage that believe in God and Jesus compared to how many are members of the state church and other religious communities," Mile told Klassekampen.
