Kerava (; ) is a town and municipality within the Uusimaa region of Finland. The municipalities of Vantaa, Sipoo and Tuusula are adjacent to Kerava, which is part of the Helsinki metropolitan area. The town has a population of () and covers an area of of which is water. The population density is . Kerava is the 30th largest municipality in terms of population, but the 5th smallest municipality in terms of area in Finland (and the second smallest in the Uusimaa region after Kauniainen). However, it is also the third most densely populated area in the sub-region after Helsinki and Kauniainen. The municipality is unilingually Finnish. The Sinebrychoff brewery operations are based in Kerava. There is also a well-known prison in the town (Keravan vankila), which includes 94 places in the open prison ward. History Until the Middle Ages, Kerava was a wilderness, until two villages, Ylikerava ("Upper Kerava") and Alikerava ("Lower Kerava"), were created along the Kerava River (Keravanjoki). The first signs of established village settlement date back to the 1440s. Kerava was annexed to Tuusula when the Tuusula parish was founded in 1643. In 1862, the railway between Helsinki and Hämeenlinna was opened, which quickly brought industry to agricultural Kerava; the carpentry factory in Kerava was established in 1908, and the wood industry became an important factor in the development of the town. The coat of arms designed by Ahti Hammar features a woodworking joints made by a carpenter. In 1924, Kerava was separated from Tuusula as its own township. At that time, it had a population of about 3,000. Originally, it also included part of the Korso area, and Korso railway station was also located in the township area. However, from 1954 onwards, the entire Korso was annexed to the then Helsinki Rural Municipality. During the peak periods of the late 1960s and 1970s, the population almost doubled due to immigration and good transport connections, and new suburbs were created in Kurkela, Kilta and Untola. Kerava was officially granted town rights in 1970. Demographics Transport Kerava has two railway stations, Kerava Central Railway Station and Savio station. The Kerava Central Railway Station is an interchange station, with connections from the main track from Helsinki to Riihimäki to the tracks to Lahti and Porvoo. The Helsinki Airport (HEL) is located about 15 kilometers to the southwest of the city by car. It is along Highway 4 (E75)