Due to the massive influx of Christian settlers in the coastal area of the then province of Lanao, the province was subdivided into what is now Lanao del Sur with pre-dominant Christian population by virtue of Republic Act. No. 2228 on May 22, 1959. Lanao del Norte has been affected by the secession movement that hit Mindanao during the recent few years. Lanao del Norte has a short mild dry season from January to April covering and average monthly rainfall of three inches. The wet season lasts from May to december with seven inches monthly average rainfal.
Several rivers traverse the province.
The most important of them is the Agus River which feeds the Maria Cristina Falls, one of the major source of hydro-electric power for the provinces and neighboring provinces. 23 municipalities and 1 city comprise the province with Iligan City, a highly industrial community, servicing as the provincial capital in the past. With the new Governor at present, the provincial capital of the province was transferred to Tubod, one of the progressive municipality of the province. Maranao dialect is used in the Maranao communities. Agriculture, fishing and forestry are the dominant source of income in Lanao del Norte.