Odemira is a town and a municipality in Beja District in the Portuguese region of Alentejo. The population in 2011 was 26,066, making it the largest municipality of Portugal by area.

It is famous for its wild beaches and for being home to a significant Dutch and German community. The village of Zambujeira do Mar is home to the Festival do Sudoeste, one of the biggest rock festivals in Europe.

The municipality of Odemira has great agricultural potential, specially in the western area of the region, and is home to major operations of important agricultural companies like Vitacress, world leader in the salad market.