The Airport Sector (abbreviated as the APS) is one of the sectors of the Central Industrial Security Force (CISF), a Central Armed Police Force of India. The sector is responsible for providing security coverage to civil airports in India under the regulatory frame work of the Bureau of Civil Aviation Security, Ministry of Civil Aviation. Headed by a special director general of police-rank officer and headquartered at New Delhi, it is the largest sector of CISF in terms of number of personnel deployed. It provides security coverage to 63 national and international airports in the country.