圣若昂-达马德拉（São João da Madeira）是葡萄牙的一座城市。位于葡萄牙的北部，在行政区划上属葡萄牙。圣若昂-达马德拉面积8.11 平方公里，2011年，有人口21,685人。是波尔图大都会区的一部份。

São João da Madeira (Portuguese pronunciation: [sɐ̃w ʒuˈɐ̃w ðɐ mɐˈðɐjɾɐ]), is a city and a municipality in northwestern region of the Portuguese Norte region. It's part of the larger Porto Metropolitan Area. The population in 2011 was 21,713. With an area of 7.94 km², it is the smallest municipality in Portugal. In 2010, the city was distinguished in Portuguese Quality of Life studies as the "Best Municipality to Live In".