Ulvila (Swedish: Ulvsby) is a town in the province of Satakunta. Ulvila is located along the Kokemäenjoki River, next to Pori. In addition to Pori, its neighboring municipalities are Harjavalta, Kokemäki, Nakkila and Sastamala. In addition to Kulla, which was connected to Ulvila, the former neighboring municipalities are the rural municipality of Pori, Noormarkku and Lavia, which were connected to Pori, and Kiikoinen, which was connected to Sastamala. The city center consists of two agglomerations on the Kokemäenjoki River, Friitala and Vanhastakylä. Ulvila is home to 12,672 people and covers an area of 422.51 km², of which 21.88 km² are water bodies. The population density is 31.63 inhabitants / km².
The city of Ulvila has a long history: it was founded in 1365, making it one of Finland's six medieval cities and the second oldest city in Finland after Turku. Ulvila lost its city rights to Pori in 1558, when the then port of Ulvila had become unusable for ships due to land uplift. 442 years later, since 2000, the municipality of Ulvila has again used the name city. The city of Ulvila got its current form when the municipality of Kullaa was annexed in 2005. On 15 and 29 December 2008, the city council of Ulvila decided on a municipal association with Nakkila, Harjavalta and Kokemäki. The alliance (called Nauhakaupunki) was to take effect at the beginning of 2011. However, the new council, which started in early 2009, decided on 2 March 2009 to terminate the merger agreement.
The local newspaper Ulvilan Seutu is published in Ulvila and has a circulation of 3,243.
Ulvila is located on the lower reaches of the Kokemäenjoki River on a clay plain that spreads on both sides of the river, on the former estuary. In the southwest, the Ulvila area comprises most of the drained Lattomeri and in the north, around Harjunpäänjoki. In the case of Vanhankylä, the Kokemäenjoki is divided into two branches, from which the larger Vanha or Pikkujoki river flows from the east and the wider Isojoki from the west. The branches enclose an island about three kilometers long, the soil of which is almost exclusively sand. Thanks to the sludge brought by the Kokemäenjoki River for centuries, the Ulvila area is particularly well suited to agriculture, and the fields cover a considerable part of the city's area (before the Kullaa Association of Municipalities, almost a third of the city's land area). Although the sea has moved more than a mile away due to land uplift, the place names Lattomeri, Soovmeri and Sunniemi are reminiscent of Ulvila's ancient location by the sea. The old shoreline is visible at the former Haistila railway station on the slope of the ridge north of the Kokemäenjoki River. Unlike the rest of Ulvila, most of the Kulla area is covered with forests, and the predominant soil type is moraine. The only lakes in Ulvila are also located in Kulla, the largest of which is Lake Joutsijärvi. Most of the Kulla area belongs to the Harjunpäänjoki catchment area, but the smallest lakes and ponds in the easternmost part flow down the Rukajoki River to Kokemäki Sääksjärvi. The majority of the cultivated area is located on the Kokemäki side, following the ridge period, on a narrow strip running from Levanpello via Koski to Palusjärvi. Due to the location of the gold in the watershed, the low water permeability of the soil and the small differences in altitude of the terrain, a large part of the forest land is marshy.
The mainland is retreating
The continental ice retreated from the Ulvila area around 7600–7500 BC. Ulvila was not yet habitable, as the area was covered by a sea about 200 meters deep. The uppermost parts of Ulvila began to rise above sea level around 2000 BC.
The inhabited parts of Ulvila are mostly quite shallow, flat in the Kokemäenjoki valley, so the area has been strongly affected by land uplift. There are signs of a hunter and seal belonging to the Kiukainen culture from the Stone Age