The Embassy of Portugal in Bangkok is the diplomatic mission of Portugal in Thailand. It is located in Bang Rak District, on the eastern bank of the Chao Phraya River, and is served by Soi Charoen Krung 30. Dating to 1820, with the ambassador's residence built in 1860, it is the oldest diplomatic mission in Thailand, and the ambassador's residence has been recognized as an award-winning historic building.

Bang Rak is one of the fifty districts (khet) of Bangkok, Thailand. It lies on the eastern bank of the Chao Phraya River, beyond Khlong Phadung Krung Kasem, which marked the old city boundary. Originating from riverside settlements dating from before the city's foundation, Bang Rak grew inland as new roads and canals were constructed through the area during the second half of the nineteenth century and the early twentieth, attracting communities of expatriates and developing into a major commercial district. Bangkok's rapid economic growth in the late twentieth century saw the areas along Si Lom and Sathon roads transformed into one of the city's main business districts, teeming with skyscrapers. The district, officially recognised at least since 1908, covers an area of 5.54 square kilometres (2.14 sq mi), and has a registered population of 48,227. Today, Bang Rak is known for the financial activity of its commercial offices, as well as its vibrant nightlife scenes. Diverse historic and religious sites, most significantly concentrated in Bang Rak Subdistrict on the waterfront, reflect the district's multicultural history.