Santa Comba Dão (Portuguese pronunciation:[ˈsɐ̃tɐ ˈkõbɐ ˈðɐ̃w]) is a city and a municipality in the district Viseu in Portugal. The population in 2011 was 11,597, in an area of 111.95km². The city proper has a population of 3,300.
The present mayor is Leonel Gouveia, elected in 2013 by Socialist Party. The municipal holiday is Ascension Day.