Liberia, officially the Republic of Liberia, is a country on the west coast of Africa, bordered by Sierra Leone, Guinea, Côte d'Ivoire, and the Atlantic Ocean. As of 2008, the nation is estimated to be home to 3,489,072 people and cover 111,369 square kilometers (43,000 sq mi).

Liberia has a hot equatorial climate with most rainfall arriving in summer with harsh harmattan winds in the dry season. Liberia's populated Pepper Coast is composed of mostly mangrove forests while the sparsely populated inland is forested, later opening to a plateau of drier grasslands. Tropical rainforests cover the hills, while elephant grass and semi-deciduous forests make up the dominant vegetation in the northern sections. The equatorial climate is hot year-round with heavy rainfall from May to October with a short interlude in mid-July to August. During the winter months of November to March dry dust-laden harmattan winds blow inland causing many problems for residents.

Liberia's watershed tends to move in a southwestern pattern towards the sea as new rains move down the forested plateau off the inland mountain range of Guinée Forestière, in Guinea. Cape Mount near the border with Sierra Leone receives the most precipitation in the nation.The country's main northwestern boundary is traversed by the Mano River while its southeast limits are bounded by the Cavalla River. Liberia's three largest rivers are St. Paul exiting near Monrovia, the river St. John at Buchanan and the Cestos River, all of which flow into the Atlantic. The Cavalla is the longest river in the nation at 515 kilometres (320 mi). Liberia's highest point is Mount Wuteve at 1,380 metres (4,500 ft) above sea level in the northwestern Liberia range of the West Africa Mountains and the Guinea Highlands. However, Mount Nimba near Yekepa, is taller at 1,752 meters (5,748 ft) above sea level but is not wholly within Liberia as Nimba shares a border with Guinea and Côte d'Ivoire (Ivory Coast) and is their tallest mountain as well.