Ciomas is a town and an administrative district (kecamatan) in Bogor Regency, West Java, Indonesia.

It is located east of the provincial border with Banten Province, about 21 kilometres southwest of the regency capital Cibinong, and 3 kilometres west of the city center of Bogor, to which it is largely suburban.

[2] The administrative centre is at Pagelaran, and the district is sub-divided into the urban community (kelurahan) of Padasuka and ten villages (desa), all sharing the postcode of 16610.

[6] Following the Independence of Indonesia, Ciomas became part of Buitenzorg Kawedanan (today's Bogor Regency).

Until 1992, Ciomas remained as a district with 40 villages and an area of 100.85 square kilometres.