Sillamäe (Estonian for 'Bridge Hill'; also known by the Germanised names of Sillamäggi or Sillamägi) is a town in Ida-Viru County in the northeastern part of Estonia, on the southern coast of the Gulf of Finland. It has a population of 12,439 (as of 2021) and covers an area of 10.54 km2. Sillamäe is located at the mouth of the Sõtke River. Its population is predominantly Russian-speaking.