里奥马约尔（Rio Maior）是葡萄牙的一座城市。面积272.8平方公里。人口21,621人。管辖有14个堂区。市假日是11月6日。

Rio Maior (Portuguese pronunciation: [ˈʁiu mɐˈjɔɾ]) is a municipality in the Santarém District in Portugal. The population in 2011 was 21,192, in an area of 272.76 km².

The present Mayor is Isaura Morais, elected by the PSD, first woman to be elected a mayor in the municipality. The municipal holiday is November 6.