13.3% of the population in Labuhan Batu Regency is Protestant.

The Protestant population in Labuhan Batu Regency as of December 31, 2023, was recorded at 68,169 individuals. This number increased by 19,211 individuals compared to the previous year, which reported 48,958 individuals.

According to data from the Directorate General of Population and Civil Registration (Ditjen Dukcapil) of the Ministry of Home Affairs, the proportion of Protestants in this regency/city reached 13.3 percent of the total population in 2024, which amounted to 511,700 individuals.

In terms of its distribution relative to the population of each region in North Sumatra, the proportion of Protestants in Labuhan Batu Regency ranks 19th.

Meanwhile, the population of North Sumatra by religion in 2023 was as follows:

* Islam: 426,629 (83.37%)
* Protestant: 68,169 (13.32%)
* Catholic: 8,211 (1.6%)
* Buddhist: 6,792 (1.33%)
* Indigenous Beliefs: 95 (0.02%)
* Hindu: 8 (0.0%)
* Confucian: 3 (0.0%)

Other regencies/cities in North Sumatra with the largest Protestant populations are: Medan City (475,357), Simalungun Regency (380,134), Deli Serdang Regency (336,163), North Tapanuli Regency (294,482), South Nias Regency (288,255), Karo Regency (239,580), Dairi Regency (233,721), Toba Samosir Regency (185,113), Humbang Hasundutan Regency (172,573), and Central Tapanuli Regency (164,221).