Portuguese colonial architecture refers to the various styles of Portuguese architecture built across the Portuguese Empire. Many former colonies, especially Brazil, Macau, and India, promote their Portuguese architecture as major tourist attractions and many are UNESCO world heritage sites. Portuguese colonial architecture can be found in the plethora of former colonies throughout South America, North Africa, Sub-Saharan Africa, India, Oceania, and East Asia.

Portuguese architecture refers to both the architecture of Portugal's modern-day territory in Continental Portugal, the Azores and Madeira, as well as the architectural heritage/patrimony of Portuguese architects and styles throughout the world, particularly in countries formerly part of the Portuguese Empire.