Sangalhos is a town and a civil parish in the municipality of Anadia, Portugal. The population in 2011 was 4,068, in an area of 16.90 km². Archaeological remnants dating back to the Roman era presuppose a minor community within the territory of Sangalhos. The pre-Roman peoples of the region of the Vouga was already a mixture of races and cultures from the northern Europe and Mediterranean, but principally of Celtic or Turduli. The origin of its name sangalhos, which refers to a unit of measure, as hypothesized by Joaquim de Silveira, came from the cult of Sao Galo. The author placed the origin of its parish in the 7th century, during the Visigothic period. During the Roman era, the area was part of the Roman civitas Talabriga.