Loreto is a municipality in the province of Dinagat Islands, Philippines. Its official population count as of the 2010 Census is 8,920.
The town became a part of the province of Dinagat Islands in December 2006, when the province was created from Surigao del Norte by Republic Act No. 9355. However, in February 2010, the Supreme Court ruled that the law was unconstitutional, as the necessary requirements for provincial land area and population were not met. The town reverted back to Surigao del Norte. On March 30, 2011, however, the Supreme Court reversed its ruling from the previous year, and upheld the constitutionality of RA 9355 and the creation of Dinagat Islands as a province. 
In 1956, the sitio of Roxas was converted into a barrio.
Loreto is politically subdivided into 10 barangays.
- Carmen (Pob.)
- San Juan (Pob.)
- Santa Cruz (Pob.)
- Santiago (Pob.)
|Population census of Loreto
|Source: National Statistics Office 
The town is endowed with rich mineral resources like aluminous laterite ore, chromite, gold, niceliferous laterite, sand and gravel, guano, rock phosphate, limestone, and siliceous sand. It is also considered as an excellent fishing ground.