Sillamäe (Russian:Силламяэ), known also in Germanized version as Sillamäggi or Sillamägi (Estonian for "Bridge Hill"), is a town in Ida-Viru County in the northern part of Estonia, on the southern coast of the Gulf of Finland. It has a population of 16,183 (as of 1 January 2010) and covers an area of 10.54 km². Sillamäe is located at the mouth of Sõtke River.