The 86th (Royal County Down) Regiment of Foot was an infantry regiment of the British Army, formed in 1793 and amalgamated into The Royal Irish Rifles following the Childers Reforms in 1881.
The regiment was raised in 1793 as a volunteer corps in Shropshire, and taken into the British Army the following year as the 86th (Shropshire Volunteers). In 1795, after the Battle of Groix it absorbed the remnants of the disbanded 118th Regiment of Foot (Fingall's Regiment), which had been raised in 1794 for service as marines.
In 1809 it became the 86th (Leinster) Regiment of Foot, and then in 1812 it was renamed as the 86th (Royal County Down) Regiment of Foot.
In 1881 it became the 2nd Battalion, Royal Irish Rifles. Its lineage is continued today by the Royal Irish Regiment.
Battle honours won by the regiment were:
Victoria Cross recipients
Colonels of the Regiment
Colonels of the Regiment were: