Misamis Oriental (Cebuano: Sidlakang Misamis; Filipino: Silangang Misamis) is a province located in the region of Northern Mindanao in the Philippines. Its capital and provincial center is the city of Cagayan de Oro, which is governed independently from the province.

Around the 10th Century, the area of what is now Misamis Oriental was under the Indianized Kingdom called the Rajahnate of Butuan.

In the 16th century, Muslims from Malaysia came and then displaced the Non-Muslim Lumads northwards as they came to control most of Mindanao, the inhabitants were also converted into Islam. As part of Mindanao, the people of the territory were obliged to pay tribute to Muslim rulers.

Legislative Act. No. 3537 approved on 2 November 1929, divided the province of Misamis into two due to the lack of geographic contiguity. It was not until ten years later on 28 November 1939 that the division between Misamis Oriental and Misamis Occidental was implemented by Act. No. 3777. When Misamis Oriental separated, Don Gregorio Pelaez became its first governor.

In 1942, at the onset of World War II in the Philippines, Japanese soldiers landed in Misamis Oriental to occupy the region. Combined American and Philippine Commonwealth forces along with recognised guerrilla fighters liberated Misamis Oriental in 1945.

In May 2014 it was reported that an area in Barangay Lapad in Laguindingan, Misamis Oriental, in northern Mindanao, was declared a heritage site. Oyster fossils older than 200,000 years were discovered, according to Balita Pilipinas. Property owner, Raul Ilogon, told Balita Pilipinas that they had been seeing the fossils for 20 years thinking that they were ordinary rocks.

...
Wikipedia