The provincial organization of volunteers and civil defence (Portuguese: organização provincial de voluntários e defesa civil) or OPVDC was a former militia type force in each of the Portuguese Overseas provinces.
There were three such organizations, raised by the Portuguese Government, in their overseas provinces of Angola, Mozambique and Timor.
The OPVDC had the tasks of auxiliary internal security force and civil defense organization, under the authority of the governor of the province.
The OPVDCA was framed by active or reserve officers of the Armed Forces, but was dependent from the Civil Administration, and its maximum in the Governor-General of the province.
The function of OPVDCA was essentially in defence of people, lines of communications and sensitive installations.