|Origin||Carbury, County Kildare|
|Mouth||Irish Sea between the townlands of Mornington, County Meath and Baltray, County Louth|
The River Boyne (Irish: An Bhóinn or Abhainn na Bóinne) is a river in Leinster, Ireland, the course of which is about 112 kilometres (70 mi) long. It rises at Trinity Well, Newberry Hall, near Carbury, County Kildare, and flows towards the Northeast through County Meath to reach the Irish Sea between Mornington, County Meath and Baltray, County Louth. Salmon and trout can be caught in the river, which is surrounded by the Boyne Valley. It is crossed just west of Drogheda by the Boyne River Bridge that carries the M1 motorway and by the Boyne Viaduct that carries the Dublin-Belfast railway line to the east.
Despite its short course, the Boyne has historical, archaeological and mythical connotations. The Battle of the Boyne, a major battle in Irish history, took place along the Boyne near Drogheda in 1690 during the Williamite war in Ireland. It passes near the ancient city of Trim, Trim Castle, the Hill of Tara (the ancient capital of the High King of Ireland), Navan, the Hill of Slane, Brú na Bóinne (an archaeological site), Mellifont Abbey, and the medieval city of Drogheda. In the Boyne Valley can also be found other historical and archaeological monuments, like Loughcrew, Kells, Celtic crosses, castles, and more.
This river has been known since ancient times. The Greek geographer Ptolemy drew a map of Ireland in the 2nd century which included the Boyne, which he called Βουουινδα (Bououinda), and somewhat later Giraldus Cambrensis called it Boandus. In Irish mythology it is said that the river was created by the goddess Boann ('queen' or 'goddess'), according to F. Dinneen, lexicographer of the Irish Gaelic language, and Boyne is an anglicised form of the name. In other legends, it was in this river where Fionn mac Cumhail captured Fiontán, the Salmon of Knowledge. The Meath section of the Boyne was also known as "Smior Fionn Feidhlimthe"  (the 'marrow of Fionn Feilim').
The Boyne Navigation is a series of canals running roughly parallel to the main river from near Oldbridge to Navan. Owned by An Taisce and currently derelict, the Inland Waterways Association of Ireland are restoring the navigation to navigable status.
There are a number of railway bridges and viaducts crossing the Boyne which are well known.
A rock with indications of being Prehistoric art was found in August 2013. Cliadh O’Gibne reported through the Archaeological Survey of Ireland that a boulder with geometric carvings had been found in Donore, County Meath. 
The Boyne Fishermen's Rescue and Recovery Service (BFRRS), near Drogheda, Co Louth, were doing one of their regular operations to remove shopping trolleys from the Boyne, in May 2013, when they discovered an ancient log boat, which experts believe May 5000 years old. Initial examination by an underwater archaeologist, suggests it could be very rare because, unlike other log-boats found here, it has oval shapes on the upper edge which could have held oars. Investigations are on-going. http://www.archaeology.org/news/867-130513-ireland-boyne-river-log-boat Log boats were found here in 2013
In 2006, the remains of a Viking ship were found in the river bed in Drogheda during dredging operations. The vessel is to be excavated as it poses a hazard to navigation.
See Annals of Inisfallen (AI)
- AI770.2 The battle of Bolg Bóinne [gained] against the Uí Néill, by the Laigin.
- Dineen: Foclóir Gaedhilge agus Béarla, 1927 ("Smior" - pg 1067, Ed.1996)
- "Newly Discovered Prehistoric Art in the Boyne Valley". National Monuments Service. Retrieved 30 November 2013.
- Viking News
- Salmon fishing on the River Boyne, from Salmon Ireland
- A canoeing and kayaking guide to the River Boyne, from Irish Whitewater