Castillo Formation

Castillo Formation can refer to:

• Castillo Formation, Venezuela, an Early Miocene geologic formation in Venezuela
• Castillo Formation, Argentina, a Cenomanian geologic formation in Argentina
• Castillo Pedroso Formation, a Jurassic geologic formation in Spain
• Cerro Castillo Formation, a Jurassic geologic formation in Argentina
• Sierra del Castillo Formation, a Carboniferous geologic formation in Spain