Question:

 God created the Heaven and Earth. Who created God?

God is called Alpha and Omega (the Beginning and the Ending)…Revelation 1:8

I am… (Exodus 3:14).

While everything we can see and touch had a beginning, God did not.  It is difficult to conceive of anything or anyone that has ALWAYS existed, without beginning, but the Lord truly has always existed.  He has no creator because He is the Creator (Colossians 1:16).