How many persons are there in the Godhead?

Answer

There are three persons in the Godhead: the Father, the Son, and the Holy Spirit, and these three are one God, the same in essence, equal in power and glory (; ; ).

Read the 3 proof texts (KJV)

1 John 5:7: For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
Matthew 28:19: Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
2 Corinthians 13:14: The grace of the Lord Jesus Christ, and the love of God, and the communion of the Holy Ghost, [be] with you all. Amen.