One Song (5-567)
One Thing We Ask, O Lord (0-053)
Only Begotten, Word of God Eternal (3-218)
Onward Christian Soldiers (3-240)
Onward, Ye Peoples! (5-031)
Open My Eyes That I May See (0-997)
Open The Gates Of The Temple (0-956)
Open the Window (2-254)
Open to Me the Gates (5-814)
Open Your Eyes Wide (4-966)
Open, Lord, My Inward Ear (3-940)
Order My Steps (5-743)
Our Beloved Canada (1-239)
Our Father (4-502)
Our Father, Which Art In Heaven (4-327)
Our God is Great (3-312)
Our God is Great! (2-039)
Our God, Our Help in Ages Past (3-737)
Our Lord In Majesty Doth Reign (5-337)
Our Lord's Prayer (2-984)
Our Savior is Alive! (6-107)
Our Song of Thanks (3-992)
Out of the Depths (3-624)
Out on the Edge of Beyond (3-873)
