Las Navas is situated in the heart of Samar Island, lying along Catubig River. It comprises a wide lowlands between hills now known as the Catubig Valley. The Las Navas river is wide and big enough that small tonnage or motored vessels can easily sail to the source of the river. It is bounded on the north by Catubig, on the east by Jipapad, Eastern Samar, on the west by Silvino Lubos, and on the south by the municipality of Matuguinao and San Jose de Buan, Western Samar (Samar). The municipality has a total land area of . Most of this land is devoted to agricultural production and the rest are forest reserves. Its soil is predominantly silt and clay loam with fine texture and high water retention. This soil type is fertile and suitable for lowland rice but needs water drainage for upland crops.
Bodies of water Rivers, brooks, creeks can be found practically when hiking from one place to another and traversed by the Las Navas River (formerly Catubig river). The Las Navas River (formerly Catubig River) is considered the main river, compared to Hinaga River and Hagbay River.
Climate {{Weather box
Barangays Las Navas is politically subdivided into 53
barangays. Each barangay consists of
puroks and some have
sitios. • Balugo • Bugay • Bugtosan • Bukid • Bulao • Caputoan • Catoto-ogan • Cuenco • Dapdap • Del Pilar • Dolores • Epaw • Geguinta • Geracdo (also known as F. Robis) • Guyo • H. Jolejole District (
Poblacion) • Hangi • Imelda • L. Empon • Lakandula • Lumala-og • Lourdes • Mabini • Macarthur • Magsaysay • Matelarag • Osmeña • Paco • Palanas • Perez • Poponton • Quezon • Quirino • Quirino District (
Poblacion) • Rebong • Rizal • Roxas • Rufino • Sag-od • San Andres • San Antonio • San Fernando • San Francisco • San Isidro • San Jorge • San Jose • San Miguel • Santo Tomas • Tagab-Iran • Tagan-ayan • Taylor • Victory • H. Jolejole ==Demographics==