Lieskovec may refer to:

• Lieskovec, Humenné District in Slovakia
• Lieskovec, Zvolen District in Slovakia

• 4th Continental Artillery Regiment
• 4th convocation of the People's Assembly of Abkhazia
• 4th convocation of the Sukhumi City Council
• 4th Corps (Afghanistan)
• 4th Corps Observation Group
• 4th Corps Observation Group (World War I)
• 4th County of London Yeomanry
• 4th County of London Yeomanry (Sharpshooters)
• 4th Critics' Choice Television Awards
• 4th dan
• 4th-dimensional
• 4th Dimensions Tour
• 4th Dismounted Brigade
• 4th Division (Japan)
• 4th Division (New Zealand)
• 4th Division (Syria)
• 4th Division (United Kingom)
• 4th Divison (United Kingdom)
• 4th dragoons
• 4th Duke of Cambridge's Own Hodson's Horse
• 4th Duke of Grafton
• 4th Duke of Northumberland
• 4th Earl of Dunmore
• 4th Earl of Plymouth
• 4th East Anglian Brigade, Royal Field Artillery