Rajamäki is a village in the municipality of Nurmijärvi in southern Finland. Rajamäki is located 45 kilometres (28 mi) north of the capital Helsinki and has a population of around 7,000 inhabitants.
Rajamäki is best known for its alcohol distillery which was established in 1888 because of the fresh and pure water found in the area. The distillery was a part of the old Finnish alcohol monopoly Alko and is now part of the Altia corporation. Dilution and bottling of Koskenkorva Viina, distilled in the distillery in Koskenkorva, Ilmajoki, is done in Rajamäki. During World War II the factory produced around 500,000 Molotov cocktails with the word "Rajamäki" inscribed on the bottle cap.
Rajamäki has an elementary school and a high school, which is focused on the sport of floorball because a lot of Finland's top young players live in the area.
The Hanko–Hyvinkää railway passes through Rajamäki, which tends to boost the businesses of the village.
Coordinates: 60°31′30″N 024°45′41″E / 60.52500°N 24.76139°E