Barangay Cangmohao is located in the municipality of Siquijor, within the province of Siquijor, Philippines. As of the 2020 Census, it has a population of 234 residents, accounting for approximately 0.81% of the municipality’s total population. Geographically, Cangmohao is situated at approximately 9.1797° North latitude and 123.5124° East longitude, with an elevation of about 101.9 meters (334.3 feet) above sea level.

While specific historical records about Barangay Cangmohao are limited, its demographic trends over the past decades provide some insights. The population has experienced fluctuations, with a slight decrease from 187 residents in 1990 to 181 in 2000, followed by growth reaching 234 by 2020. These changes suggest periods of migration or other socio-economic factors influencing the barangay’s population dynamics.

Cangmohao shares boundaries with several adjacent barangays, including Lambojon, Songculan, Cang-adieng, and San Antonio within the municipality of Siquijor, as well as Canasagan, Cansayang, and Candura in the neighboring municipality of San Juan.