Christianity in the 20th century was characterized by an accelerating secularization of Western society, which had begun in the 19th century, and by the spread of Christianity to non-Western regions of the world.
Kekristenan pada abad ke-20 diwarnai oleh sekulerisasi masyarakat Barat, yang dimulai pada abad ke-19, dan penyebaran agama Kristen ke wilayah non-Barat di seluruh dunia.