Standard tuning; I noticed a lack of guitar 
chords for this song on this website, 
and nobody else has the right ones. You can 
put the capo however you want, but I 
don't use one.

Am                 G  Am
O come, O come, Emmanuel                
      F             G  Am
And ransom captive Israel
      F                Am   Em 
That mourns in lonely exile here        
F                 G     Am
Until the Son of God appear
G            Am      F Am               
Rejoice! Rejoice! Emmanuel              
        F             Em Am
Shall come to thee, O Israel.
___________________________________________________________________
O come, Thou Rod of Jesse, free         
Thine own from Satan's tyranny
From depths of Hell Thy people save             
And give them victory o'er the grave
Rejoice! Rejoice! Emmanuel                      
Shall come to thee, O Israel.
___________________________________________________________________
O come, Thou Day-Spring, come and cheer 
Our spirits by Thine advent here
Disperse the gloomy clouds of night             
And death's dark shadows put to flight.
Rejoice! Rejoice! Emmanuel                      
Shall come to thee, O Israel.
___________________________________________________________________
O come, Thou Key of David, come,                
And open wide our heavenly home;
Make safe the way that leads on high,   
And close the path to misery.
Rejoice! Rejoice! Emmanuel                      
Shall come to thee, O Israel.
___________________________________________________________________
O come, O come, Thou Lord of might,     
Who to Thy tribes, on Sinai's height,
In ancient times did'st give the Law,           
In cloud, and majesty and awe.
Rejoice! Rejoice! Emmanuel                      
Shall come to thee, O Israel.