Guinea-Bissau, officially known as the Republic of Guinea-Bissau, is a country located in West Africa. It shares land borders with Senegal and Guinea. The official language is Portuguese. The capital and largest city is Bissau.
The flag of Guinea-Bissau was adopted on independence from Portugal in September 1973. The design consists of two equal horizontal stripes of yellow and green. The hoist features a vertical red stripe with a black star at its center.
| Capital City | Area (World Ranking) | 2023 Population (World Ranking) | Currency | Flag Ratio (Decimal) | Adopted |
| Bissau | 36,125 km² / 13,948 mi² (135th) | 2,035,073 (146th) | West African CFA franc (XOF) | 1:2 (0.5) | 1973 |