79.9% of Salatiga City's population is Muslim.

The Muslim population in Salatiga City, as of December 31, 2023, was recorded at 160,470 people. Compared to the previous year, the number of residents practicing Islam in the regency/city increased by 3,902 people.

According to data from the Directorate General of Population and Civil Registration (Ditjen Dukcapil) of the Ministry of Home Affairs, the proportion of the Muslim population in this regency/city reached 79.9 percent of the total population in 2023, which numbered 200,740 people.

Based on the distribution across the population of each region in Central Java, the proportion of the Muslim population in Salatiga City ranks 34th.

Meanwhile, the population of Central Java by religion in 2023 is as follows:

* Islam: 160,474 (79.94%)
* Protestant: 30,984 (15.44%)
* Catholic: 9,124 (4.55%)
* Buddhist: 683 (0.34%)
* Hindu: 82 (0.04%)
* Indigenous Beliefs: 17 (0.01%)
* Confucian: 5 (0.0%)

Other regencies/cities in Central Java with the largest Muslim populations are Brebes Regency (2,049,083 people), Cilacap Regency (2,006,687 people), Banyumas Regency (1,828,568 people), Tegal Regency (1,708,725 people), Pemalang Regency (1,571,040 people), Grobogan Regency (1,499,245 people), Semarang City (1,485,169 people), Kebumen Regency (1,420,918 people), Pati Regency (1,341,492 people), and Magelang Regency (1,298,638 people).