Lars Erik ("Lasse") Dahlquist (14 September 1910 in Örgryte (grew also up in Lidingö) – died 14 October 1979 on Brännö, Gothenburg archipelago due to laryngeal cancer) was a Swedish composer, singer and actor.

He was married to Inez Margareta Dahlquist, née Lindquist (1911–2004) from 1936 and they had a son; the saxophonist Robert "Bob" Dahlquist (2 September 1938 – 6 September 2005).

On Saltholmen, at the terminal of the boats of Styrsöbolaget, there is a place called Lasse Dahlquists Plats.

As a child, he spent his summers at his grandfather's farm, Langegården, on Brännö where he built his own home as well.

He worked at Sven-Olof Sandberg's music publishment Svenska Noter and in 1931 he began recording gramophone records.