Kayh is located on the slopes of the Schoenbuch below the Grafenberg. The village formerly extended along the B 28, giving rise to the phrase "as long as Kayh". The addition of several new residential areas has improved its appearance and the construction of a bypass with a sound-insulating wall in connection with the nearby Lake Constance motorway has also eliminated the once-heavy through traffic.
There is a bus connection to Herrenberg which links up with the Stuttgart city railway and to Entringen (Ammer valley railway to Tuebingen).
From 1900 to the end of the Second World War, the population of Kayh was just under 700. At the end of the war, an influx of refugees and displaced persons increased the population by 200 in a short period. It was only as a result of the building of residential areas in the years 1965 to 1990 that the population rose to its present level of 1,400. Over time, the village has been transformed from a farming community to a residential centre. Even now, though, practically every family has ist own little orchard, as the slopes of the Schoenbuch are noted for the cultivation of cherries and plums.
The village of Kayh dates back to around 1190. Monks from Ottobeuren living in Altingen grew wine on the slopes of the Schoenbuch. Thanks to their wine, the people of Kayh enjoyed a long period of prosperity - to which the splendid half-timbered town hall and the wine press bear witness. The switch to fruit-growing and cider-making led to a serious deterioration in the middle of the 17th century. The 800th anniversary was celebrated over two weekends in September 1990. Over 20,000 visitors came to Kayh for the Sunday procession alone.
Kayh has been part of Herrenberg since the 1-12-1971. Practically all administrative matters can be dealt with at the local district office. There is a local committee which discusses all matters concerning the village. There are also 2 town councillors on Herrenberg town council.
Facilities needed in the village such as town hall, kindergarten and primary school (secondary modern pupils go to Altingen, all other pupils go to Herrenberg), fire brigade equipment store, gymnasium and meeting hall (together with Moenchberg), cemetery and Protestant church are all to be found in the village. The range of services is rounded off by banks, bakers, butchers, grocers and various other craft shops and service providers.
The sewerage system with its connection to the Gaeu/Ammer water treatment plant and water supply (from Lake Constance) meet the highest modern standards.
The renovation of roads and side-roads during the construction of the through road (formerly the B 28, now the district road) provided an incentive for privately financed building improvements as well. An outline plan was drawn up for the development and renovation of the village centre. Projects worth mentioning in the village centre include a new bank building and flats (instead of the old school), the private renovation of the old rectory (flat and a flower shop) and the renovation of the old wine press (rooms for the town, evening classes and clubs).
As for club activities, the choral society (a mixed choir) and the brass choir are worth mentioning. For the sporting, a variety of activities are available, including a sports ground in the woods and a clubhouse. The interests of fruit tree growers and gardeners are catered for in the Fruit and Gardening Club. The local history and folk costumes club includes members who have furnished a small farmhouse and decked it out as a local history museum and a folk costume group that uses flails among other implements.