0.04% of the population in Aceh Besar Regency is Catholic.

The Catholic population in Aceh Besar Regency as of December 31, 2023, was recorded at 188 individuals. Compared to the previous year, the number of Catholic residents in the regency/city decreased by 149 individuals.

According to data from the Directorate General of Population and Civil Registration (Ditjen Dukcapil) of the Ministry of Home Affairs, the proportion of Catholics in this regency/city reached 0.04 percent of the total population in 2024, which numbered 439,050 individuals.

Considering its distribution relative to the population of each area in Aceh, the proportion of Catholics in Aceh Besar Regency ranks fifth.

The following is a list of Aceh's population by religion in 2023:
* Islam 434,101 (98.87%)
* Protestant 855 (0.19%)
* Catholic 188 (0.04%)
* Buddhist 142 (0.03%)
* Hindu 12 (0.0%)
* Indigenous Beliefs 0 (0.0%)
* Confucianism 0 (0.0%)

Other regencies/cities in Aceh with the largest Catholic populations, in descending order, are: Aceh Tenggara Regency (2,286 individuals), Aceh Singkil Regency (1,392 individuals), Subulussalam City (800 individuals), Banda Aceh City (485 individuals), Lhokseumawe City (141 individuals), Aceh Tengah Regency (126 individuals), Aceh Tamiang Regency (92 individuals), Aceh Barat Regency (64 individuals), Sabang City (62 individuals), and Nagan Raya Regency (51 individuals).