|— Municipality —|
|Motto: Uswag Isulan (Onward Isulan)|
|Founded||August 30, 1957|
|- Mayor||Zaynab Mohamad|
|Time zone||PHT (UTC+8)|
|Income class||1st Class Municipality|
The bulk of Isulan's population is predominantly Muslim, accounting for 82% of the municipality's population. The other 8% are Christians, mostly Roman Catholicism, Protestant, Iglesia ni Kristo, Evangelical and Jehova Witnesses with non-denominational sections.
The Maguindanaoan language is spoken by the great majority of the population, there are also speakers of Maranaoan and Iranun - those who migrated from the Lanao region. There are smaller communities of Tausūg-speaking communities. A handful of the majority of Moro Muslims can speak Malay as a second language, others Chavacano, or both. Other languages include mostly Visayan language, namely Cebuano, Waray-Waray, Hiligaynon as well as Tagalog and Kapampangan.