He is the "ruler of this world" in John 12:31.

And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night.”

This page provides some summary lists of the largest religious groups in the United States.
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WORLDteen engages young teens with the truth in a way that helps them pursue the kind of life God intends. With stories they can relate to in relevant magazine articles, attention-grabbing digital content, and creative digital apps, your teen will learn to navigate the culture with WORLDTeen.

Make the Word of God, the , your Final Authority!

These numbers tend toward the high end of reasonable worldwide estimates.
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You adulterers and adulteresses, know you not that the friendship of the world is enmity with God? whoever therefore will be a friend of the world is the enemy of God.

Your guide to the World gods, spirits, demons and legendary monsters

Since the fall of Communism in former Soviet nations and the relaxation of anti-religious policies in China, observed religious affiliation and activity has increased dramatically, especially in Christianity, Buddhism, and Islam.

The religion of Islam - Religious Tolerance: Islam

Many people are unaware, for instance, that China has one of the largest, most active Christian communities in the world, and that in many former Soviet nations religions such as shamanism, Islam and Russian Orthodoxy remained even while official government reports announced the elimination of religion in these regions.

About Islam: Islam is the second most popular religion in the world.

Prior to Communist takeovers of these regions and government attempts to eradicate religion, both places had very high levels of affiliation with organized religions (especially Islam, Christianity, Buddhism and Taoism), as well as high levels of participation in and belief in traditional local traditions such as shamanism, ancestor ceremonies, spiritism, etc.

God Loves the World - Catholic Exchange

10 to 12, 2003, sample size 1,004 adults (Jennifer Harper, "Religion leads to a merrier Christmas," 11 December 2003, The Washington Times) reported that 2% of Americans identify themselves as Latter-day Saints.

The Wisdom of This World is Foolishness With God

Teens Share Parents' Religion, Survey Finds," by Veronica Torrejon, 26 February 2005) is significantly higher than the proportion of Americans claimed by the Church as members, indicating two things: 1) Church membership skews young, with a higher proportion of teenagers claiming membership than older adults; and 2) nearly all teens counted as members on denominational records also identify themselves as Latter-day Saints.