The Cameronians (Scottish Rifles) was a rifle regiment of the British Army, the only regiment of rifles amongst the Scottish regiments of infantry. It was formed in 1881 under the Childers Reforms by the amalgamation of the 26th Cameronian Regiment and the 90th Perthshire Light Infantry. In 1968, when reductions were required, the regiment chose to be disbanded rather than amalgamated with another regiment, one of only two infantry regiments in the British Army to do so, with the other being the York and Lancaster Regiment. It can trace its roots to that of the Cameronians, later the 26th of Foot, who were raised in 1689. The 1881 amalgamation coincided with the Cameronian's selection to become the new Scottish Rifles.

The 26th (Cameronian) Regiment of Foot was an infantry regiment of the Scots Army and subsequently a Scottish infantry regiment of the British Army, active from 1689 to 1881. Although the regiment took the name of its first colonel as The Earl of Angus's Regiment, it became popularly known as The Cameronians until 1751, when it was ranked as the 26th Foot. Under the Childers Reforms it amalgamated with the 90th Regiment of Foot to form the Cameronians in 1881. The Cameronians were themselves disbanded in 1968, meaning that no Army unit today perpetuates the lineage of the 26th Foot.