12th meridian may refer to:

• 12th meridian east, a line of longitude east of the Greenwich Meridian
• 12th meridian west, a line of longitude west of the Greenwich Meridian

• Jalisco Stadium
• Jaliseh
• Jaliseh-ye Pain
• Jaliseh-ye Pa'in
• Jalitah
• Jaliwada
• Jaliya Kaibarta
• Jaliyat al-Kadr
• Jalizab
• Jalizav
• Jalizi
• Jalizi-ye Abdolreza
• Jalizi-ye Ali Nasir
• Jalizi-ye Bala
• Jalizi-ye Hanzaleh
• Jalizi-ye Pa'in
• Jalizi-ye Pain
• JAL Japan Airlines
• Jal-Jeera
• Jalk
• Jalkapalloseura Rakuunat
• Jalkhand
• Jalkot taluka
• Jalkot Taluka
• Jalkovec