Regulars

• 1st Battalion (Regular)
  1st Battalion, York and Lancaster Regiment
  The 1st Battalion, York and Lancaster Regiment was formed in 1881 from the 65th Regiment of Foot .- Early history :After amalgamation in the army reform of 1881 the new 1st Battalion of the York and Lancaster Regiment were based in Bengal, India. In 1882 they were shipped to Aden while the 2nd...
  
   - World War I - 83rd Brigade, 28th Division. World War II - 15th Brigade
  British 15th Infantry Brigade
  The 15th Infantry Brigade is a British Army brigade. It was part of the regular British 5th Infantry Division during the Second World War, and is now part of the British 2nd Infantry Division in the north of the United Kingdom, with specific responsibility for the areas of North East England and...
  
  , 5th Infantry Division
  British 5th Infantry Division
  The 5th Infantry Division is a regular army division of the British Army. It was established by Arthur Wellesley, 1st Duke of Wellington for service in the Peninsula War, as part of the Anglo-Portuguese Army, and has been active for most of the period since, including the First World War and the...
  
  
• 2nd Battalion (Regular)
  2nd Battalion, York and Lancaster Regiment
  The 2nd Battalion, York and Lancaster Regiment was formed by the redesignation of the 84th Regiment of Foot in 1881.-History:...
  
   - World War I - 16th Brigade
  British 16th Infantry Brigade
  The British 16th Infantry Brigade was a British Army formation based in Palestine at the beginning of the Second World War as part of the British 8th Infantry Division. It was later part of the British 6th Infantry Division which was redesignated as the British 70th Infantry Division on 10 October...
  
  , 6th Division
  British 6th Infantry Division
  The 6th Infantry Division was first established by Arthur Wellesley, 1st Duke of Wellington for service in the Peninsula War as part of the Anglo-Portuguese Army and was active for most of the period since, including the First World War and the Second World War...
  
  . World War II - 14th Brigade
  British 14th Infantry Brigade
  The British 14th Infantry Brigade was a British Army formation during both the First World War and the Second World War.- World War I :In 1914 this brigade was part of the 5th Division and moved over to France...
  
  , 6th Infantry Division (later 70th Infantry Division)
  British 70th Infantry Division
  - History :This formation had a brief history during the Second World War. It was formed originally in the Middle East from units stationed in Egypt, Palestine, Cyprus and in Crete, as the regular British 6th Infantry Division. It was then redesignated as the 70th Division on 10 October 1941. -...
  
  

Territorials and Volunteers

• 1st (Hallamshire) Battalion (1881–1908)
• 2nd Volunteer Battalion (1881–1908)
• 4th (Hallamshire) Battalion (1908–1924)
• 5th Battalion (1881–1936)
• The Hallamshire Battalion (1924–1967)
• Yorkshire Volunteers (1967–1993)
• The Hallamshire (T) Battalion (1967–1971)
• 1/4th (Hallamshire) Battalion - 148th (3rd West Riding) Brigade, 49th (West Riding) Division
• 1/5th Battalion - 148th (3rd West Riding) Brigade, 49th (West Riding) Division

Hostilities only units

• 2/4th (Hallamshire) Battalion (1914–1919) - 2nd Line Territorial Army - 187th Brigade, 62nd (2nd West Riding) Division
• 3/4th (Hallamshire) Battalion (1915–1919) - 3rd Line TA - Home Service
• 2/5th Battalion (1914–1918) - 2nd Line TA - 187th Brigade, 62nd (2nd West Riding) Division
• 3/5th Battalion (1915–1916) - 3rd Line TA - Home Service
• 5th Battalion (1939–1945) (1st Line TA) - converted to 67th Heavy Anti-Aircraft Regiment, Royal Artillery
  Royal Artillery
  The Royal Regiment of Artillery, commonly referred to as the Royal Artillery , is the artillery arm of the British Army. Despite its name, it comprises a number of regiments.-History:...
  
  
• 6th (Service) Battalion (1914–1919) - 32nd Brigade, 11th (Northern) Division
• 6th Battalion (1939–1947) (2nd Line TA) - 138th Infantry Brigade, 46th (North Midland) Division
• 7th (Service) Battalion (Pioneers) (1914–1919) - 50th Brigade, 17th (Northern) Division
• 7th Battalion (Pioneers) (1940–1946) - served in India
  India
  India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
  
   throughout the war
• 8th (Service) Battalion (1914–1919) - 70th Brigade, 23rd Division
• 8th Battalion (Pioneers) (1940–1945) - Indian 25th Division
  25th Infantry Division (India)
  The 25th Indian Infantry Division was a division of the Indian Army during World War II which fought in the Burma Campaign during World War II.-History:...
  
  
• 9th (Service) Battalion (1914–1919) - 70th Brigade, 23rd Division
• 9th Battalion (1940–1946) - Indian 25th Division
  25th Infantry Division (India)
  The 25th Indian Infantry Division was a division of the Indian Army during World War II which fought in the Burma Campaign during World War II.-History:...
  
  
• 10th (Service) Battalion (1914–1918) - 63rd Infantry Brigade, 21st Division (attached to 37th Division from 1916)
• 10th Battalion (1940–1941) - converted to 150th Regiment, Royal Armoured Corps
  Royal Armoured Corps
  The Royal Armoured Corps is currently a collection of ten regular regiments, mostly converted from old horse cavalry regiments, and four Yeomanry regiments of the Territorial Army...
  
  , 254th Indian Tank Brigade
• 11th Reserve Battalion (1914–1916) - 90th Brigade, 33rd Division - Home Service, disbanded 1916
• 11th Battalion (1940–1944)
• 12th (Sheffield) (Service) Battalion (1914 - 1918) The Sheffield City Battalion - 94th Brigade, 31st Division
• 13th (1st Barnsley) (Service) Battalion (1914 - 1915) The Barnsley Pals
  Barnsley Pals
  The Barnsley Pals were two Pals battalions during the First World War.They were formed as the 13th and 14th Battalions of the York and Lancaster Regiment...
  
   - 94th Brigade, 31st Division (attached 93rd Brigade from Feb. 1918)
• 14th (2nd Barnsley) (Service) Battalion (1914 - 1918) The Barnsley Pals
  Barnsley Pals
  The Barnsley Pals were two Pals battalions during the First World War.They were formed as the 13th and 14th Battalions of the York and Lancaster Regiment...
  
  - 94th Brigade, 31st Division
• 15th Reserve Battalion (1915–1916) - Home Service
• 16th (Transport Workers) Battalion (1916–1919) - Home Service
• 17th Labour Battalion (1916–1917) - Home Service
• 18th Battalion ( -1918) - 41st Brigade, 14th (Light) Division (from June 1918)
• 50th (Holding) Battalion (1940)
• 53rd (Service) Battalion (1919)