Eastern Visayas (Waray: Sinirangan Kabisay-an; Cebuano: Sidlakang Kabisay-an; Tagalog: Silangang Kabisayaan; Filipino: Silangang Visayas), designated as Region VIII, is an administrative region in the Philippines. It consists of three main islands: Samar, Leyte, and Biliran. The region has six provinces: Biliran, Leyte, Northern Samar, Samar, Eastern Samar, Southern Leyte, one independent city, Ormoc, and one highly urbanized city, Tacloban (its regional center and largest city). The highly urbanized city of Tacloban is the sole regional center. These provinces and cities occupy the easternmost islands of the Visayas group of islands, hence the region's name.

Eastern Visayas faces the Philippine Sea to the east. The region's most famous landmark is the San Juanico Bridge, which links the islands of Samar and Leyte. As of 2024, the Eastern Visayas region has a population of 4,625,929 inhabitants, making it the least populous region in the Visayas.

The current name of the region was derived from the position of its islands, which are all situated in the easternmost part of the Visayas.

Eastern Visayas lies on the east-central section of the Philippine archipelago. It consists of three main islands, Leyte, Biliran, and Samar, which form the easternmost coasts of the archipelago. It is bounded on the east and north by the Philippine Sea with the San Bernardino Strait separating Samar from southeastern Luzon; on the west by the Camotes and Visayan seas, and on the south by the Bohol Sea with the Surigao Strait separating Leyte from northeastern Mindanao. It has a total land area of 2,156,285 hectares (5,328,300 acres) or 7.2% of the country's total land area. 52% of its total land area is classified as forestland and 48% as alienable and disposable land.

There are two types of climate prevailing in the region under the Coronas system of classification: Type II and Type IV. Type II climate is characterized by having no dry season but a pronounced maximum rainfall from November to January. Samar Island and the eastern part of Leyte Island fall under this type of climate. Type IV, on the other hand, has an even distribution of rainfall year-round and a short period of dry season that can be observed starting in February up to May. This type of climate is well exhibited in the western half of Leyte Island and in some portions of Samar, which covers the municipality of Motiong up to San Isidro in Northern Samar.

As the region directly faces the Philippine Sea, typhoons coming from the east frequently strike the region, often at their peak intensities. This, along with the Bicol Region, are the most typhoon-prone areas in the Philippines. In 2013, the region was struck by Typhoon Haiyan, locally known as Super Typhoon Yolanda, which later became the deadliest and most destructive typhoon to hit the Philippines in the satellite era.

The region's sea and inland waters are rich sources of salt, freshwater fish, and other marine products. It is one of the main fish-exporting regions of the country. There are substantial forest reserves in the interiors of the islands. Its mineral deposits include chromite, uranium (in Samar), gold, silver, manganese, magnesium, bronze, nickel, clay, coal, limestone, pyrite and sand and gravel. It also has abundant geothermal energy and water resources to support the needs of medium and heavy industries.

Eastern Visayas consists of 6 provinces, 1 highly urbanized city, 1 independent component city, 5 component cities, 136 municipalities and 4,390 barangays.