0.03% of the population in Aceh Barat Regency is Catholic.

The Catholic population in Aceh Barat Regency as of December 31, 2023, was recorded at 64 individuals. This number is a decrease of 76 individuals compared to the previous year, which reported 140 individuals.

According to data from the Directorate General of Population and Civil Registration (Ditjen Dukcapil) of the Ministry of Home Affairs, the proportion of the Catholic population in this regency/city reached 0.03 percent of the total population in 2023, which numbered 204,470 individuals.

Considering its distribution relative to the population of each region in Aceh, the proportion of the Catholic population in Aceh Barat Regency ranks ninth.

Below is the population of Aceh by religion in 2023:
* Islam 203,332 (99.44%)
* Buddhist 669 (0.33%)
* Protestant 410 (0.2%)
* Catholic 64 (0.03%)
* Hindu 0 (0.0%)
* Indigenous Beliefs 0 (0.0%)
* Confucian 0 (0.0%)

Compared to other regions in Aceh, the Catholic population in this regency/city ranks ninth out of the 23 regencies/cities in Aceh Province.

Other regions with the highest number of Catholics in Aceh Province are Aceh Tenggara Regency (2,286 individuals), Aceh Singkil Regency (1,392 individuals), Subulussalam City (800 individuals), Banda Aceh City (485 individuals), Aceh Besar Regency (188 individuals), Lhokseumawe City (141 individuals), Aceh Tengah Regency (126 individuals), Aceh Tamiang Regency (92 individuals), Sabang City (62 individuals), and Nagan Raya Regency (51 individuals).