The 1448 clash was the first decisive victory for a Scottish force over the English since the Battle of Otterburn, 60 years earlier.
It was the final pitched battle between the two countries in the period of the Hundred Years War.
The inventory aims to raise awareness of "important battlefield sites".
Historic Environment Scotland's Philip Robertson said: "Following an application from a member of the public, we carried out further research into the Battle of Sark, and found that it met the criteria to be added to the inventory.
"The battle was fought during a fascinating and tumultuous period of Scottish history, and we hope that by adding it to the inventory we will raise awareness of the battlefield site, stimulate further research around it, and develop its potential as an educational resource and site for visitors."
Renewed border skirmishing saw Henry Percy, future 3rd earl of Northumberland, defeated by Hugh Douglas, earl of Ormond, on 23 October 1448.
The encounter took place on the river Sark, near Gretna.
Percy was taken prisoner and had to be ransomed.
The following year the English burned Dumfries and Dunbar, and the Scots Alnwick and Warkworth.
Source: The Oxford Companion to British History
The Inventory of Historic Battlefields was created in 2011 and helps with the protection and management of battlefields.
The full list of other battlefields, added in three phases, are: Alford (1645), Ancrum Moor (1545), Auldearn (1645), Bannockburn (1314), Bothwell Bridge (1679), Culloden (1746), Dunbar II (1650), Dupplin Moor (1332), Falkirk II (1746), Glenshiel (1719), Harlaw (1411), Killiecrankie (1689), Kilsyth (1645), Philiphaugh (1645), Pinkie (1547), Prestonpans (1745) and Sheriffmuir (1715).
Barra (1308), Carbisdale (1650), Cromdale (1690), Drumclog (1679), Fyvie (1645), Inverkeithing II (1651), Inverlochy II (1645), Linlithgow Bridge (1526), Mulroy (1688), Rullion Green (1666) and Stirling Bridge (1297).
Blar-na-Leine (1544), Dunbar I (1296), Dunkeld (1689), Glenlivet (1594), Inverlochy I (1431), Langside (1568), Loudoun Hill (1307), Roslin (1303), Sauchieburn (1488), Skirmish Hill (1526) and Tippermuir (1644).

Police were called to McLeod Street near Tynecastle Stadium at about 15:00 on Saturday, 3 October, to a reports of a fight involving 20 rival supporters.
A 21-year-old man from Kilmarnock was charged at the scene.
A further 14 men and boys, aged 14-28, have been charged with various offences.
All are due to appear at Edinburgh Sheriff Court on 17 February 2016.
Insp Bob Innes of Police Scotland said: "We treat such incidents extremely seriously.
"The safety of everyone attending football matches is of paramount importance and violence and disorder will not be tolerated.
"Thanks to some excellent police work and with the assistance of our partners at Hearts Football Club, we have successfully traced and charged 14 males in connection with this incident.
"They will appear in court in due course and in the meantime they have been ordered not to attend at any regulated football match in the UK.
"I can reassure the public that anyone involved in this sort of criminal activity will be swiftly dealt with."

The four boys and one girl were reported missing on Monday afternoon.
The last confirmed sighting had been at Clonfeckle Tower. The scouts, all aged 13, had been due to walk to Craigshields, north of Ae Forest.
They were reported to be equipped with adequate outdoor clothing and torches. They were found and brought to safety by police officers.
The site of the Battle of Sark near Gretna has been added to Scotland's Inventory of Historic Battlefields taking the total to 40.
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Police have arrested and charged 14 football fans in connection with a clash before last month's match between Hearts and Kilmarnock in Edinburgh.
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Five scouts have been found safe and well after an overnight search in a forest in south-west Scotland.