Cebu province is part of Region VII or the Central Visayas Region. Oslob is one of the 44 municipalities of Cebu, located at the southern part of the province.
You can reach Oslob from Dumaguete via Sibulan port. From Liloan port in Cebu, you can either ride the bus or rent a motorcycle (not advisable since it’s quite a bumpy ride). If you’re on a big group, renting a multicab would be best.
(you may check our budget and itinerary for this trip – Siquijor, Oslob and Dumagute)