BD-12 may refer to:

• Bede BD-12, an American aircraft design
• Chuadanga District, a Western district of Bangladesh

• Concepción del Bermejo (Chaco)
• Concepción del Oro
• Concepción del Oro (municipality)
• Concepción del Uruguay Regional Faculty
• Concepción Department (disambiguation)
• Concepción (disambiguation)
• Concepción District, Ayacucho
• Concepción District, Concepción
• Concepción District, Junín
• Concepción District, Vilcas Huamán
• Concepción, Junín
• Concepción Lake
• Concepción lake
• Concepción Province (disambiguation)
• Concepción Pápalo
• Concepción Quetzaltepeque El Salvador
• Concepción River
• Concepción, Santa Cruz
• Concepción (Santa Cruz)
• Concepcíon
• Concepcíon, California
• Concept2
• Concept algebra
• Concept artwork
• Concept bike