Montainville () is a commune in the Yvelines department in the Île-de-France region in north-central France. The inhabitants are called Montainvillois and Montainvilloise. Geography Montainville is located in the centre of the Yvelines department, at 19 km in the south-east of Mantes-la-Jolie and 26 km in the north-west of Versailles. The river Mauldre is at the east of the city. The territory of Montainville is relatively small (479 hectares while the average in the department is 872). It is located between the Mantois plateau and Mauldre valley, the village is at the edge of the plateau at a height of around 120m. As in the rest of the region, Montainville has a temperate oceanic climate. Temperatures vary between 2 °C and 5 °C in winter and 14 °C and 25 °C in summer on average, with a relatively low amount of rainfall (600mm per year). Urbanism The territory of the municipality is covered in 2017 at 89,67% of agricultural, forest and natural land, 4,41% of open artificial spaces and 5,93% of built artificial spaces. The territory is essentially rural, and the urban area represents only 25 hectares. The inhabited space is concentrated in the village, with a few houses along the river Mauldre. In Montainville, we can find mainly stone houses and rural residences, built notably in the 19th century. New residential areas were built during the 20th century. Housing in Montainville was recorded in 1999. At the time, the village was composed of 222 accommodations, 174 of them being a main residence and 33 a second home. In 2019, there was 262 houses with 79,5% of main residences.Real estate in Montainville is relatively old, 70% of the houses were built before 1975 and 45% before 1949 (while the average in the region is 33,7%). The vast majority of inhabitants, around 81%, were owners of their houses at the time of the record. Toponymy The name of the town was recorded under different forms including Montenvilla around 1130 and in 1220, Montainvilla around 1248, in 1272 and in 1351, Montainville 1370, Montainvilla in 1494, Montainville in 1564, Matinville around the 17th century. The name of the village is derived of the medieval wording ending in -ville which refers to a country estate, where the first part of the word Montain- represents the name of a person. Homonymy with Montainville (Eure-et-Loir). History The origins The valley of the Mauldre was conducive