Verse 1:
D                     G       Bm
Joy to the world, the Lord is come
    G        A        Bm
Let earth receive her King
    G       D      G         D
Let every heart prepare Him room
    Bm                 
And Heaven and nature sing
    A                
And Heaven and nature sing
    G            Em          A      D
And Heaven, and Heaven, and nature sing

Verse 2:
D                     G       Bm
Joy to the Earth, the Savior reigns
    G     A           Bm
Let all their songs employ
      G           D              G           D
While fields and floods, rocks, hills and plains
    Bm                 
Repeat the sounding joy
    A                 
Repeat the sounding joy
    G     Em          A      D
Repeat, repeat, the sounding joy

Chorus:
G              D
Joy, unspeakable joy!
     A
Overflowing well
     G
No tongue can tell
G              D
Joy, unspeakable joy!
       A
Rises in my soul
       Em        G
Never lets me go

(Key Change)

Verse 3:
E                        A        C#m
He rules the world with truth and grace
    A          B       C#m
And makes the nations prove
     A      E       A        E
The glories of His righteousness
    C#m                 
And wonders of His love
    B                 
And wonders of His love
    A         F#m     B       E
And wonders, wonders, of His love.

Chorus:
A              E
Joy, unspeakable joy!
     B
Overflowing well
     A
No tongue can tell
A              E
Joy, unspeakable joy!
      B
Rises in my soul
     F#m         A
Never lets me go

来源：www.ultimate-guitar.com