Oliveira de Azeméis (Portuguese pronunciation: [ɔliˈvɐjɾɐ ð(ɨ) ɐzɨˈmɐjʃ]) is a city and a municipality located in Porto Metropolitan Area in Portugal. Administratively, the municipality belongs to the District of Aveiro. The population of the municipality in 2011 was 68,611, in an area of 161.10 km2. The city itself has a population of about 20,000. Oliveira de Azeméis is located 35 km to the south of Porto. It is less than 20 km far from the Atlantic Ocean. The municipal holiday is the Monday that follows the 2nd Sunday of August.