Sundsvall, or Sundsvall och Timrå is a city and the seat of Sundsvall Municipality in Västernorrland County, Sweden. As of 2023, the city has a population of 70,918; nearly 100,000 live in the municipal area. It is Sweden's 17th largest city by population. The city is widely known for its stone buildings in the city centre, known as "Stenstaden".