An Abhainn Mhór (meaning 'the big river') is the Irish name for several rivers etc. in Ireland:

• Avonmore River, flows from the Wicklow Mountains to the Irish Sea at Arklow
• Munster Blackwater, flows from Kerry through counties Cork and Waterford into the Celtic Sea at Youghal Harbour
• A former name for Avoca, County Wicklow, a small town
• Owenmore River (County Mayo), flows from the Nephin Beg Range of mountains into the Atlantic at Tullaghan Bay
• Owenmore River (Connemara), flows from Ballynahinch Lake to Bertraghboy Bay
• Owenmore River (County Sligo), a river in County Sligo
• Owenmore River (County Cavan), a river in County Cavan

This disambiguation page lists articles associated with the title An Abhainn Mhór.
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