Deißlingen (Swabian: Deißlinge) is a municipality of the district of Rottweil of Baden-Württemberg, Germany.

In 1802–03, Deißlingen, a possession of the Free Imperial City of Rottweil, and Lauffen ob Rottweil, a property of Rottenmünster Abbey, were mediatized to the Electorate, later Kingdom, of Württemberg. Deißlingen was assigned to a newly organized Oberamt at Rottweil [de], and Lauffen to Oberamt Spaichingen [de]. Lauffen joined Deißlingen in Rottweil's jurisdiction on 27 October 1810. The district was reorganized on 1 October 1938 as Landkreis Rottweil, to which the two towns were still assigned. On 1 January 1974, Lauffen was incorporated into Deißlingen and a new municipality formed.

The municipality (Gemeinde) of Deißlingen covers 32.15 square kilometers (12.41 sq mi) of the Rottweil district of Baden-Württemberg, which assigns Deißlingen to the metropolitan area of Villingen-Schwenningen, Tuttlingen, and Rottweil. Deißlingen is physically located in a transitional landscape between the muschelkalk-keuper plateaus of the Upper Gäu [de] to the north, the Swabian Jura to the east, and the Baar to the south. Elevation above sea level in the municipal area ranges from a high of 753 meters (2,470 ft) Normalnull (NN) at the border with Tuttlingen district to a low of 574 meters (1,883 ft) NN on the Neckar as it forms the border with Rottweil.

The forested slopes of the Neckar and Mückenbach river valleys were declared Federally-protected landscapes [de] in 1953. They were joined in 1990 by the Eschach valley [de].

Deißlingen has two boroughs (Ortsteile): Deißlingen and Lauffen.

The municipal coat of arms for Deißlingen shows a blue wolfsangel upon a field of yellow, with a black bar at the top containing a yellow stag antler, a clear reference to Württemberg. The wall anchor is a motif associated with Lauffen ob Rottweil's as early as 1780. This coat of arms is a combination of those of the towns of Deißlingen and Lauffen, with a change made to the chief to comply with the rule of tincture. The Rottweil district office approved the official use of the coat of arms and issued a corresponding municipal flag on 10 December 1981.

• Official website (in German)