The municipality is located on both sides of the Kinzig river in the Main-Kinzig district of Hesse. Its territory extends into the hills of the Vogelsberg to the north and into the Spessart to the south. The two main population centres, Bad Soden and Salmünster, are both situated in the Kinzig valley.
Subdivisions
The Stadt Bad Soden-Salmünster today consists of the following 11 Stadtteile :,, Bad Soden, Hausen,, Katholisch-Willenroth,,,, Salmünster and. Bad Soden and Salmünster are the two Kernstadtteile. The current municipality was created in the of 1970, 1972 and 1974.
Salmünster as a settlement likely dates to the 9th century, but is first mentioned in a document from around 1000, as Salchenmunster. Soden, probably created by Fulda Abbey ca. 909, appears in a document from ca. 1190, referred to as Sodin. Around 152, the abbot of Fulda Abbey had Burg Stolzenberg erected. Town rights were bestowed in 1296 and 1320, by King Adolf and Emperor Ludwig, respectively. In 1536, the Huttenschloss was built. In medieval times, salt works were an important source of local income at Soden. Since the 12th century the water of the local wells, with a high salt and iron content, was used for salt production. The springs and the village were mortgaged by the abbot of Fulda to the lords of Hutten in 1330, who initially lived at Stolzenfels before moving to a new palace in the mid-16th century. When the Hutten family came into financial difficulties, they in turn mortgaged the area to the Archbishop of Mainz. However, the temporal organization of the Archbishopric, the Erzstift, was already running salt works at nearby Orb. To avoid internal competition, salt production at Soden was ended in the later 16th century. The salt well was rediscovered in 1837, and in 1838 Robert Bunsen conducted an analysis of the well's water. In 1872, Soden was granted permission to use the wells for a spa. The first Kurhaus was erected in 1889, by which time the region had become a part of the Kingdom of Prussia. Soden has been a Heilbad and therefore called "Bad Soden" since 1928.
Creation of the current town
The current town was created only on 1 July 1974 when the towns of Salmünster and Bad Soden bei Salmünster merged. During earlier Gebietsreformen, as of 1 December 1970 Wahlert had become a part of Bad Soden. Ahl and Eckardroth followed on 1 April 1972. Alsberg and Hausen were merged with Salmünster on 1 January 1970 followed by Kerbersdorf and Romsthal on 1 December 1970 and Katholisch-Willenroth on 1 July 1972. Since 1974, the town has been part of the Main-Kinzig district, it was previously part of the Schlüchtern district.
- a town castle built around 1536 by Lukas von Hutten
- the current Baroque parish church was built in 1737-45. It is part of the ensemble of the Franciscan monastery at Salmünster.
- the original castle was first mentioned in 1540. Under Daniel Brendel von Homburg it was rebuilt into a small Schloss. Today, it serves as a youth hostel and is not open to the public.
Wallfahrtskirche Heiliges Kreuz - small church at Alsberg
Mernes water works - water works built in 1914 by the Prussians to supply water to the military training area between Bad Orb and Jossgrund. It was bought in 1952 by the city ofFrankfurt, when it once again took over the summer camp at Wegscheide. The Mernes works long supplied water to the camp until it was replaced with a new water line from Bad Orb. Mernes still uses water pumped from the works.
At Ahl, the Kinzig is dammed by the , which serves both to control floods and to generate hydroelectric power. Like in other communities in the area, such as Biebergemünd, Flörsbachtal, Bad Orb and Jossgrund, there is currently controversy over plans to build additional towering wind farms on the wooded peaks. A number of these have already been built in the neighbouring town of Wächtersbach very close to the municipal boundary. Environmentalists and many locals reject these plans due to the destruction of forests and animal habitats, possible health risks to residents, as well as threats to local property values and, in particular, to the tourism business as a result of a declining attractiveness of the region to visitors. It is also questioned whether local winds are strong and constant enough to allow economical operation of the wind farms.
Notable residents
Kurt Lamm, footballer, coach, manager, and administrator