Data Penduduk Menurut Agama
| No. | Kecamatan | Islam | Kristen Protestan | Katolik | Hindu | Budha | Konghucu | Lainnya | Jumlah |
| 1 | Pulau Banyak | 4459 | 159 | - | | | | | 4618 |
| 2 | Pulau Banyak Barat | 1780 | 1372 | 9 | | | | | 3161 |
| 3 | Singkil | 20079 | 49 | - | | 2 | | | 20130 |
| 4 | Singkil Utara | 10088 | 440 | 7 | | | | | 10535 |
| 5 | Kuala Baru | 2659 | - | - | | | | | 2659 |
| 6 | Simpang Kanan | 11641 | 4688 | 36 | | | | 10 | 16375 |
| 7 | Gunung Meriah | 37448 | 2342 | 209 | | | | 1 | 40000 |
| 8 | Danau Paris | 4777 | 1909 | 975 | | | | 146 | 7807 |
| 9 | Suro | 6918 | 1841 | 77 | - | - | | 129 | 8965 |
| 10 | Singkohor | 7100 | 71 | 16 | - | - | - | | 7187 |
| 11 | Kuta Baharu | 6651 | 5 | | | | | | 6656 |
| Kab. Aceh Singkil | 113600 | 12876 | 1329 | 0 | 2 | 0 | 286 | 128093 |
