| Kleinkirchheim | Sankt Oswald | Zirkitzen |
|---|---|---|
| Aigen (population: 57) | Sankt Oswald (168) | Rottenstein (99) |
| Bach (302) | Staudach (167) | Zirkitzen (418) |
| Kleinkirchheim (357) | ||
| Obertschern (127) | ||
| Unterschern (168) |
The settlement apparently didn't exist before Roman times. A minister was mentioned named Pabo in a document dated 5 July 1166, in which archbishop Konrad II of Salzburg confirms the donation of a chapel in the area. This is considered the first mention of Bad Kleinkirchheim.
In September 1473 the Turks broke into the region, robbing the town and plundering the valleys. On 25 June 1478 a group of about 600 farmers tried unsuccessfully to drive out their leaders. By 1480 the Turks had left, possibly as a result of an invasion of Hungarians.
During the Reformation, many farmers in the area became Lutheran, however by the late 16th century freedom of religion had been bestowed on the residents. But when Ferdinand II, Holy Roman Emperor rose to power, he made Roman Catholicism the official religion. However, Protestants still managed to smuggle books and hold secret meetings, and in 1781 a Protestant or Jew would have nearly all the rights of a Catholic.
Bad Kleinkirchheim was shortly ruled by France during the Napoleonic Wars. The Revolution of 1848 also affected the area, as farmers (which then made up most of the town's population) got more rights.
Finally, in 1973, Bad Kleinkirchheim officially had the "Bad" (bath, spa) attached to its name, Kleinkirchheim, a reference to the popular hot spring.
Bad Kleinkirchheim officially has a population of 1,863 people, as of the census of 2001. Following is a list of the population increase since 1869:
| Year | Inhabitants |
|---|---|
| 1869 | 915 |
| 1880 | 968 |
| 1890 | 970 |
| 1900 | 968 |
| 1910 | 1,062 |
| 1923 | 944 |
| 1934 | 1,055 |
| 1939 | 1,043 |
| 1951 | 1,268 |
| 1961 | 1,352 |
| 1971 | 1,731 |
| 1981 | 1,783 |
| 1991 | 1,889 |
| 2001 | 1,863 |
93.4% of the inhabitants of Bad Kleinkirchheim are Austrian by nationality. The largest portion of the foreign population comes from South-East Europe (Yugoslavia 1.7%, Croatia 1.0%, Bosnia and Herzegovina 0.5%) as well as from Germany (1.4 %). 95.2% of the population speak German, 1.8% Serbian and 1.0% Croatian. 62.3% of the population admit themselves to Roman Catholicism, 30.8% are Protestants and 2.0% Orthodox, 0.8% are Muslims, 3.5% are without religious confession.
Besides skiing, other less popular sports include football, golf, and tennis. The town also has a chess club.