koostua

Koostua is a small municipality located in the southern part of Finland, within the region of Uusimaa. Established in the early 20th century, the community lies approximately 35 kilometres east of the capital city Helsinki and is surrounded by a mixture of forested areas, agricultural fields, and a series of lakes that are part of the region’s extensive water network. The municipality covers an area of roughly 78 square kilometres, of which about 12 percent consists of inland water bodies.

The population of Koostua is estimated at around 4 200 residents, reflecting a modest growth trend driven in part by commuters who work in Helsinki but prefer a rural living environment. The local economy is primarily based on agriculture, forestry, and small‑scale manufacturing, with several family‑owned farms producing dairy, berries, and grains. In recent years, tourism has contributed to the economic profile, as the surrounding lakes attract anglers and recreational boaters, while the nearby nature reserves provide opportunities for hiking and birdwatching.

Koostua maintains a range of public services, including a primary school, a health centre, and a cultural house that hosts community events and exhibitions. The municipality is governed by a council of elected representatives who oversee local planning, infrastructure, and environmental preservation initiatives. Notable landmarks include the historic Koostua Church, built in 1923, and the Koostua Lake Dam, which regulates water levels for both flood control and hydroelectric power generation. The community emphasizes sustainable development and has implemented programs to promote renewable energy use and the conservation of its natural landscapes.