The 58th (Rutlandshire) Regiment of Foot was a British Army line infantry regiment. During the Childers Reforms it was united with the 48th (Northamptonshire) Regiment of Foot to form the Northamptonshire Regiment.
The 58th was formed in 1755 for service during the Seven Years' War. Originally numbered the 60th Regiment of Foot, and bearing the name of its colonel, Robert Anstruther, it was re-numbered in 1757 as the 58th Regiment of Foot. In 1779, during the American War of Independence they were stationed at Gibraltar, taking part in the Great Siege from 1779 to 1783. In 1782 they acquired their county association, becoming the 58th Rutlandshire Regiment. In the French Revolutionary Wars the 58th saw action in Egypt at the Battle of Alexandria, and later, under Wellington in the Peninsular campaign. During this they fought at Salamanca and at Burgos. In 1843 the 58th regiment took over garrison duties in New South Wales from the 80th who had been posted to India. In 1845 they were sent to New Zeaand because of Maori unrest in the Bay of Islands due to dissatisfaction with the Treaty of Waitangi. The regiment remained in N.Z. until November 1858 having been in action during the Northern Wars, Wanganui and north of Wellington during 1845-47. On embarkation for England, the regiment consisted of 16 officers and 194 men. Over 300 men of the regiment took discharge in New Zealand. In 1881, as part of the Childers Reforms, the 58th were amalgamated with the 48th (Northamptonshire) Regiment of Foot, becoming the 2nd battalion of the Northamptonshire Regiment.