Erottaja

thumb|right|Erottaja square. Erottaja (; ), ; ; ), is a public square near the centre of Helsinki, Finland.

Erottaja square has been selected as the official geographic "zero point" of Helsinki. Distances to all other cities in Finland are measured starting from here. In practice, the square functions as the meeting point of central Helsinki's two famous streets, Esplanadi and Mannerheimintie. The square is the western endpoint of Esplanadi, with the eastern endpoint being at the market square. Mannerheimintie, the longest and most famous street in Helsinki, begins at Erottaja and continues northwest, past the districts of Töölö and Ruskeasuo, until finally merging with a highway leading outside the city. The starting points of both Finnish national roads, the Tampere Highway (E12) and the Lahti Highway (E75), are located approximately in Erottaja.