Oslob, officially the Municipality of Oslob (Cebuano: Lungsod sa Oslob; Tagalog: Bayan ng Oslob), is a municipality in the province of Cebu, Philippines. According to the 2020 census, it has a population of 29,264 people.

Oslob is bordered to the north by the town of Boljoon, to the west are the towns of Ginatilan and Samboan, to the east is the Cebu Strait, and to the south is the town of Santander. It is 116 kilometres (72 mi) from Cebu City.

Generally, the area's topography is hilly and rolling, dominated by open grasslands and second-growth forests. There are fairly level and rolling plateaus and valleys spread throughout the interior. These are some of the most suitable areas for upland agriculture. The highest mountain peak is 800 metres (2,600 ft) above sea level.

Faraon clay steep phase; Medellin clay Lugo clay

Land utilization

Category Land Area ha acres Classified Forest / Reservation / Timberland 9,619 23,770 71.4%   Arable Area 5,045 12,470 37.4%   Certified Alienable / Disposable Land 1,563 3,860 11.6%   Industrial 242 600 1.8%   Residential 220 540 1.6%   Unclassified Forest Land / Wilderness 66 160 0.5%   Commercial 13 32 0.1%   National Parks / Playgrounds 6 15 0.0%   Roads 0 0 0.0% Wildlife / Military Reserve Land 0 0 0.0%

Oslob is politically subdivided into 21 barangays. Each barangay consists of puroks and some have sitios.

PSGC	Barangay	Population			±% p.a.
		2020		2010
072235001	Alo	4.1%	1,196	1,389	▾	−1.48%
072235002	Bangcogon	4.2%	1,231	952	▴	2.60%
072235003	Bonbon	5.3%	1,555	1,226	▴	2.41%
072235004	Calumpang	3.5%	1,024	941	▴	0.85%
072235005	Canangca‑an	1.6%	481	603	▾	−2.23%
072235009	Cansalo‑ay	2.3%	681	487	▴	3.41%
072235007	Can‑ukban	2.0%	584	525	▴	1.07%
072235006	Cañang	3.4%	1,009	1,010	▾	−0.01%
072235010	Daanlungsod	5.9%	1,736	1,556	▴	1.10%
072235011	Gawi	6.4%	1,876	1,509	▴	2.20%
072235012	Hagdan	2.5%	731	670	▴	0.88%
072235014	Lagunde	11.2%	3,273	2,829	▴	1.47%
072235015	Looc	4.0%	1,183	1,048	▴	1.22%
072235016	Luka	4.1%	1,210	1,106	▴	0.90%
072235017	Mainit	4.6%	1,339	1,312	▴	0.20%
072235018	Manlum	1.4%	411	456	▾	−1.03%
072235019	Nueva Caceres	4.1%	1,189	991	▴	1.84%
072235020	Poblacion	15.2%	4,446	4,037	▴	0.97%
072235021	Pungtod	5.4%	1,567	1,421	▴	0.98%
072235023	Tan‑awan	5.2%	1,512	1,169	▴	2.61%
072235024	Tumalog	3.5%	1,030	879	▴	1.60%
	Total		29,264	26,116	▴	1.14%

The municipality of Oslob belongs to Coronas climate type III with a dry season from February to September and the wet season from October.

Population census of Oslob

Year Pop. ±% p.a. 1903 9,819 —     1918 12,351 +1.54% 1939 13,473 +0.41% 1948 13,614 +0.12% 1960 14,497 +0.52% 1970 16,290 +1.17% 1975 18,799 +2.91% 1980 19,053 +0.27%	Year Pop. ±% p.a. 1990 19,782 +0.38% 1995 21,686 +1.74% 2000 22,472 +0.77% 2007 22,732 +0.16% 2010 26,116 +5.18% 2015 27,893 +1.26% 2020 29,264 +0.95%
Source: Philippine Statistics Authority

Poverty incidence of Oslob

10 20 30 40 50 60 2006 55.10 2009 50.85 2012 40.42 2015 35.73 2018 22.60 2021 42.83 Source: Philippine Statistics Authority

Public Markets: 2

The official festival of Oslob is the annual Toslob Festival which coincides with the feast of the Immaculate Concepcion in December.

The official was originally named Sadsad Festival (which started as a barangay festival of Poblacion) and then was renamed to Sadsadayon Festival, but was changed again to Toslob Festival.

The Baluarte (Spanish for watchtower) of Oslob was built in 1788. Its main purpose was to provide a safe place wherein guards could observe the surrounding area. It was a part of the defense system in dispelling the Moro raiders of the past, which included 6 other watchtowers along the coastline of Oslob. Just near the cuartel, are the ruins of an ancient watchtower. So effective was this system that in 1815, the townspeople of Oslob were able to repel one such attack and remain at peace ever since. This prompted them to relocate the town to its present site from their fortified settlement in Daanglungsod, which is now in ruins but still breathtaking.

Oslob was established as a visita of Boljoon in 1690 and became an independent parish in 1848 with the Immaculate Conception as its patroness. The present-day church of cut coral stone was started in 1830 and finished 18 years later. The buttresses were added between 1848 and 1850. The adjacent bell tower was built in 1858. The church was burned down during the Second World War liberating Philippine Commonwealth troops and Cebuano guerillas against the Japanese in Oslob in 1945, and 1955 but was eventually restored.

Outside the walls are the remains of a watchtower, one of the many that line the southeastern coast of Cebu.

The church is connected to the parish house or convento which still has its original clay-tiled roof. Across the road from the church is the former mortuary chapel with a pediment decorated with a relief of a human skeleton. North of the complex is a small road that leads to the old cemetery.

In 2008, a fire gutted the 19th-century church's interior, including the altar and adjacent rectory, but it spared the image of Our Lady of Immaculate Conception, which is inside a glass case, and the 73 other icons near the door to the bell tower.

Located front right of the church of Oslob, just outside the perimeter stone fence and near the sea, at the intersection of Calle Aeternidad and the end of Calle Aragones, stands an unfinished building made of coral blocks resembling a Spanish-era barracks. This was intended to be the cuartel, barracks for Spanish soldiers or guardia civil. It was started about 1860, but remained unfinished at the end of Spanish occupation in 1898.

Sumilon Island is a 24-hectare (59-acre) coral island off the coast of Bancogon, Oslob, Cebu. The island hosts the Sumilon Bluewater Island Resort.

The island of Sumilon is located in the southeastern tip of Oslob. It is the first marine protected area in the Philippines; created as a marine sanctuary in 1974 under the guidance of the Silliman University Marine Reserve of Dumaguete in the nearby province of Negros Oriental.

Sumilon has four major dive sites, which are Garden Eel Plaza, Nikki's Wall, Coral Landscape and Julie's Rock. The island's diving sites are famous for their superb visibility, stunning reefs and abundance of varied tropical marine species that provide an ideal and memorable dive. There are occasional sightings of black tip sharks during dives. A popular attraction in Sumilon Island is its sandbar because of its changing shapes and shifting locations around the island depending on the season. Other places of interest in the island are a natural lagoon with high mangroves and natural caves used by fishermen to seek refuge during storms, and a lake. On the south portion of the island, a lighthouse rests on a protected tree park, and beside it is a "baluarte", a historical watchtower built as part of a warning system to thwart slavers and marauders in the 19th century.

Besides diving, there is also bird-watching, picnicking, fishing, hiking, island tours, paddling and trekking. The island is 125 kilometres (78 mi) from Cebu City and separated from the mainland by the Cebu Strait. It is also close to Dumaguete in the nearby island province of Negros Oriental.

From the port of Oslob, there are various boats to the island. Another route to Sumilon Island is via Dumaguete since it is also close to the island.

Whale sharks can be spotted in Tan‑awan which is 10 kilometres (6.2 mi) from the center of the town. It has become a popular tourist attraction. Local fishermen feed the whale sharks by hand.

Tumalog Falls, also called as "Toslob falls" or "Mag-ambak falls", is situated in barangay Luka. It takes approximately three and a half hours to get to the area from Cebu City. Most tourists who go whale shark swimming in Tanawan include this waterfall in their itinerary.

• National Road: 20.00 kilometres (12.4 mi)
• Provincial Road: 22.00 kilometres (13.7 mi)
• Municipal Road : 5.75 kilometres (3.6 mi)
• Barangay Road : 32.50 kilometres (20.2 mi)

The public schools in the town of Oslob are administered by one school district under the Schools Division of Cebu Province.

Elementary schools:

• Agutay Elementary School — Can-ukban
• Alo Elementary School — Alo
• Bancogon Primary School — Bangcogon
• Cañang Elementary School — Cañang
• Canangcaan Elementary School — Canangca-an
• Daanlungsod Elementary School — Calumpang
• Gawi Elementary School — Gawi
• Hagdan Elementary School — Hagdan
• Looc Elementary School — Looc
• Mainit Elementary School — Mainit
• Manlum Primary School — Manlum
• Nueva Caceres Elementary School — Nueva Caceres
• Oslob Central Elementary School — N. Bacalso Avenue, Poblacion
• Tan-awan Elementary School — Tan-awan

High schools:

• Cañang-Marcelo Luna National High School — Sitio Sayaw, Cañang
• Oslob National High School — N. Bacalso Avenue, Poblacion
• Pungtod National High School — Pungtod
• Tan-awan National High School — Tan-awan

Integrated schools:

• Cansaloay Integrated School — Cansaloay
• Tumalog Integrated School — Tumalog

Private schools:

• St. Mary's Academy — J.P. Rizal Street, Poblacion

• Philippine Standard Geographic Code