138th

• 138 (number)
• 138 BC
• 138th (Edmonton, Alberta) Battalion, CEF
• 138th (Lincoln and Leicester) Brigade
• 138th Aero Squadron
• 138th Attack Squadron
• 138th Brigade (People's Republic of China)
• 138th Delaware General Assembly
• 138th Field Artillery Brigade
• 138th Fighter Wing
• 138th Georgia General Assembly
• 138th Guards Motor Rifle Brigade
• 138th Illinois Volunteer Infantry Regiment
• 138th Indiana Infantry Regiment
• 138th Infantry Regiment (United States)
• 138th New York State Legislature
• 138th Ohio Infantry
• 138th Pennsylvania Infantry
• 138th Rifle Division (Soviet Union)
• 138th Street (IRT Third Avenue Line)
• 138th Street (Manhattan)
• 138th Street Bridge
• 138th Street – Grand Concourse (IRT Jerome Avenue Line)
• 138th meridian east
• 138th meridian west
• AD 138
• Connecticut's 138th assembly district
• Pennsylvania's 138th Representative District
• The Simpsons 138th Episode Spectacular
• Third Avenue – 138th Street (IRT Pelham Line)