Certenejas (Barrio Certenejas) is a barrio in the municipality of Cidra, Puerto Rico. Its population in 2010 was 6,049. A newer barrio, it was formed from part of Bayamón barrio, also in Cidra.
Barrios (which are, in contemporary times, roughly comparable to minor civil divisions) in turn are further subdivided into smaller local populated place areas/units called sectores (sectors in English). The types of sectores may vary, from normally sector to urbanización to reparto to barriada to residencial, among others.
The following sectors are in Certenejas barrio:
, and .