Ghana occupies 238,533 square kilometers on West Africa's Atlantic coast, positioned between latitudes 4° and 12°N and longitudes 4°W and 2°E. The country extends approximately 672 kilometers from north to south and spans roughly 536 kilometers at its widest east-west axis. Ghana shares a 2,420-kilometer land border with three nations: Côte d'Ivoire to the west (720 kilometers), Burkina Faso to the north (602 kilometers), and Togo to the east (1,098 kilometers). The southern boundary consists of 539 kilometers of Gulf of Guinea coastline along the Atlantic Ocean. The Republic of Ghana encompasses sixteen administrative regions: Greater Accra, Ashanti, Western, Central, Eastern, Volta, Northern, Upper East, Upper West, and Brong-Ahafo were the original ten regions established in 1983, with six additional regions created in December 2018 through subdivision of existing territories.
The Volta River system dominates Ghanaian hydrology and shapes the country's physical geography more than any other single feature. The White Volta originates in Burkina Faso and enters Ghana near the northern border town of Paga, flowing southward for approximately 550 kilometers through Ghanaian territory. The Black Volta forms most of Ghana's western border with Côte d'Ivoire and Burkina Faso, running roughly 860 kilometers before converging with the White Volta near Yapei in the Northern Region. The Oti River drains the eastern portions of northern Ghana, collecting water from the Gambaga Escarpment before joining the main Volta channel. These tributaries unite to form the Volta proper, which flows southward through narrow gorges before reaching the Akosombo Dam. Construction of the Akosombo Dam between 1961 and 1965 created Lake Volta, which covers 8,502 square kilometers at full capacity. This surface area makes Lake Volta the world's largest artificial lake by surface extent, though not by volume. The lake extends approximately 400 kilometers from the Akosombo Dam northward to the confluence zone near Yapei, with a shoreline measuring roughly 4,800 kilometers when all inlets are included. Maximum depth reaches 75 meters near the dam wall, while average depth across the entire lake measures approximately 18.8 meters. Total water volume at capacity reaches 148 cubic kilometers. The Volta discharges into the Gulf of Guinea east of Ada Foah, creating an estuary and delta system that extends approximately 30 kilometers inland.
South of the Volta Basin, several independent river systems drain directly to the Atlantic Ocean. The Pra River originates near Mpraeso in the Eastern Region and flows 240 kilometers southwestward to reach the ocean near Shama, draining a basin of approximately 23,200 square kilometers. The Ankobra River runs 190 kilometers through the Western Region, entering the Gulf of Guinea at Axim after draining 8,340 square kilometers. The Tano River forms portions of Ghana's southwestern border with Côte d'Ivoire, flowing 400 kilometers total with approximately 100 kilometers in Ghanaian territory before reaching the Atlantic near Ehy in Ivorian waters. The Birim River, a major tributary of the Pra, drains portions of the Eastern Region across 250 kilometers. The Densu River serves the Greater Accra Region, flowing 116 kilometers from headwaters near Nsawam to the ocean west of Accra at Bortianor. None of these southern rivers achieves the scale of the Volta system, but they provide critical water resources for Ghana's most densely populated regions and support alluvial diamond and gold deposits in their valleys.
Ghana's topography divides into five distinct physiographic zones running generally in east-west bands across the country. The coastal plain extends 15 to 25 kilometers inland from the Atlantic shoreline, maintaining elevations below 100 meters above sea level. This zone contains sandy beaches, coastal lagoons including Keta Lagoon in the east and Benya Lagoon at Elmina, and extensive coconut palm vegetation. The Volta Delta occupies the eastern portion of this coastal zone. Moving inland, the Ashanti Uplands occupy central Ghana, characterized by rolling terrain between 150 and 300 meters elevation. This zone contains Ghana's richest gold deposits and most productive agricultural land. The Kwahu Plateau rises abruptly from the Ashanti Uplands along an east-west escarpment reaching 762 meters at its highest point near Mpraeso. This plateau forms the southern boundary of the Volta Basin and creates a distinct climatic divide. North of the Kwahu Plateau, the Volta Basin forms a broad depression where elevations drop to 30-60 meters in the valley floor, creating Ghana's most extensive area of low-lying terrain outside the coastal zone. The northern high plains occupy Ghana's Upper West, Upper East, and portions of the Northern Region, where elevations rise gradually from 150 meters to over 300 meters. The Gambaga Escarpment forms the dramatic northern edge of this zone, rising 300 meters above the surrounding plains near Gambaga town in the Upper East Region.
Ghana's highest elevations cluster in the Togo-Atakora mountain range along the eastern border with Togo. Mount Afadjato reaches 885 meters above sea level near the village of Liati Wote in the Volta Region, making it Ghana's highest point. The mountain consists of quartzite bedrock and rises sharply from surrounding terrain at 600-700 meters elevation. Afadjato sits within the Agumatsa Wildlife Sanctuary, a 13.8-square-kilometer protected area established in 1969. Nearby Mount Djebobo reaches 876 meters, just nine meters lower than Afadjato. These peaks receive Ghana's highest rainfall totals, exceeding 2,000 millimeters annually. The Togo Hills extend northward from Afadjato for approximately 150 kilometers, maintaining elevations between 600 and 800 meters. In the Upper East Region, the Tongo Hills form an isolated granite massif rising to 850 meters near Tongo village, creating Ghana's second-highest elevated region. The Kwahu Plateau, while not matching the absolute elevations of these border ranges, forms Ghana's most extensive highland zone, covering approximately 2,500 square kilometers between 450 and 762 meters elevation.
Lake Bosomtwe occupies a meteorite impact crater in the Ashanti Region, 30 kilometers southeast of Kumasi. The lake measures 10.5 kilometers in diameter and covers approximately 52 square kilometers. Maximum depth reaches 81 meters, though average depth measures approximately 45 meters. The crater formed roughly 1.07 million years ago when a meteorite struck Precambrian metasedimentary rocks. The crater rim rises 150-250 meters above the lake surface, creating a closed drainage basin with no natural outlet. Water leaves the system only through evaporation and seepage. The lake level fluctuates seasonally by 1-2 meters and shows longer-term cycles of 3-4 meters over decades. Thirty villages surround the lake on the outer crater slopes, with a combined population exceeding 70,000. The Ashanti people consider Bosomtwe sacred, associating it with the deity Twi. Traditional fishing occurs only from wooden planks called padua, as traditional belief prohibits iron boats from touching the water. Lake Bosomtwe represents Ghana's only natural lake of significant size, though seasonal lagoons and wetlands exist along the coast and in northern floodplains.