门廊（拉丁语：Porticus）指建筑物门前突出的，有顶盖、有廊台的信道。

门廊常被用于古希腊的建筑中，后来被古罗马人借用过去。在古代建筑中，它是用来供人歇脚、散步、躲雨和躲避夏日酷暑的地方。这种建筑结构在中世纪和文艺复兴时期得到了继承，在近代被广泛用于古典主义建筑，也就是18世纪-19世纪期间。

A portico (from Italian) is a porch leading to the entrance of a building, or extended as a colonnade, with a roof structure over a walkway, supported by columns or enclosed by walls. This idea was widely used in Ancient Greece and has influenced many cultures, including most Western cultures.