Ciomas is a town and administrative district (kecamatan) located in the Bogor Regency of West Java, Indonesia. It covers an area of 16.07 km2 and serves as a significant residential and administrative area situated near the provincial border with Banten Province.
The district is positioned approximately 3 kilometres west of the city center of Bogor. Although it lies outside the official city boundaries, Ciomas is considered an integral part of the city. It is located about 21 kilometres southwest of Cibinong, the regency capital, and borders various districts within both Bogor City and Bogor Regency.
Demographic data indicates that the population grew from 149,167 in the 2010 Census to 170,486 in the 2020 Census. As of mid-2024, the official population estimate for the district is approximately 166,220.