Lambert II may refer to:

• Lambert II of Nantes (d. 852)
• Lambert II of Spoleto (c. 880 – 898)
• Lambert II, Count of Louvain (d. 1054)
• Lambert II, Count of Lens (d. 1054)
• Lamberto II da Polenta (d. 1347)

• CSX Mountain Subdivision
• CSX Ohio River Subdivision
• CSX Old Main Line Subdivision
• CSX Philadelphia Subdivision
• CSX Porter Branch
• CSX predecessors
• CSXR
• CSX Rigolets Pass Bridge
• CSX St. Louis Line Subdivision
• CSX Susquehanna River Bridge
• CSX Trenton Subdivision
• CSX Washington Subdivision
• CSY
• CSY3
• CSY4
• CSY8
• C symmetry
• C syndrome
• C++ syntax
• CSZ
• CSZ3
• CSZ4
• CSZ9
• Csáfordjánosfa
• Csákberény