Miranda do Douro or Miranda de l Douro in Mirandese is a city and a municipality in the district of Bragança, northeastern Portugal. The population in 2011 was 7,482, in an area of 487.18 km2. The town proper had a population of 1,960 in 2001. Referred to as the "Cidade Museu" of the Trás-os-Montes region, it is located 86 kilometres from Bragança, preserving many of its medieval and Renaissance-era traditions and architecture. It has a language of its own, Mirandese, which enjoys official status in Portugal, in addition to cultural and historical discontinuity with the rest of the Portuguese state. The town is located on the border with Spain, with the Douro River separating the two countries. The nearest town in Spain is Zamora.

Mirandese is an Asturleonese language or variety that is sparsely spoken in a small area of northeastern Portugal in eastern Tierra de Miranda. The Assembly of the Republic granted it official recognition alongside Portuguese for local matters with Law 7/99 of 29 January 1999. In 2001, Mirandese was officially recognised by the European Bureau for Lesser-Used Languages, which aims to promote the survival of the least spoken European languages.