Dweller at the Threshold (DATT) was an electronic music band based in Portland, Oregon, USA from 1993 to 2005. The band lineup changed through the years but primarily consisted of Paul Ellis and Dave Fulton. Ellis left the band sometime after the third CD, Ouroborus, was released. 2004 saw the release of Full Boundary Condition and Passenger 4. The former was a 3 disk box set that contained the first 2 DATT CDs remastered and a third disk of a live performance of the band after Ouroborus was released, while the latter was a collaborative effort with the Dutch group Free System Projekt.

Dweller at the Threshold was one of the few US based electronic music bands to have performed in the Berlin School style of electronic music. The band has performed internationally at electronic music festivals and on both the east and west coasts of the United States. DATT has received national airplay on PRI's Echoes, XM radio, Hearts of Space.