Teufenthal is a municipality in the district of Kulm in the canton of Aargau in Switzerland.

The street lies in the lower part of a tight, three-kilometer long side of Wyna, in an easterly direction to the plateau of Dürrenäsch.

Only a small part of the village lies in the Wyna valley, the river forms the western border.

42.0% of the total land area is heavily forested and 1.1% is covered with orchards or small clusters of trees.

Neighboring municipalities are Gränichen in the north, Seon in the northeast, Dürrenäsch Unterkulm in the east and south.

The blazon of the municipal coat of arms is Or on a Pile inverted issuant from chief Azure a Mullet of Five and Crescent of the first.

[4] Most of the population (as of 2000[update]) speaks German (85.7%), with Serbo-Croatian being second most common (6.8%) and Italian being third (2.6%).

[4] The age distribution, as of 2008[update], in Teufenthal is; 154 children or 9.4% of the population are between 0 and 9 years old and 213 teenagers or 13.0% are between 10 and 19.

[8] The historical population is given in the following chart:[13] As of  2012[update], there were a total of 289 people employed in the municipality.

[11] From the 2000 census[update], 377 or 23.6% were Roman Catholic, while 875 or 54.8% belonged to the Swiss Reformed Church.