Portimão is a town (cidade) and a municipality in the district of Faro, in the Algarve region of southern Portugal. It was formerly known as Vila Nova de Portimão. In 1924, it was incorporated as a cidade and became known merely as Portimão. Historically a fishing and shipbuilding centre, it has nonetheless developed into a strong tourist centre oriented along its beaches and southern coast. The two most populous towns in the Algarve are Portimão and Faro.

The municipality is located on the western southern coast of the Algarve, bordering the municipalities of Lagos, Lagoa, Monchique and Silves.

The geographical distribution of the altitude and relief of the municipality of Portimão generically follow the three types of territory present in the Barlavento: the coastal region, the Barrocal (a region between the coastal region and the mountains) and the mountains up north. Each one with their own geological, morfological and pedological characteristics.

The badlands of Ponta João D'Arens host several species of birds and the Ria de Alvor dunes allow the existence of a marshland and estuary, on which a great diversity of species depend, both fauna and flora, as well as the communities of fishermen and local shellfishers. Portimão is crossed by the Arade River.