Hildegunn Øiseth (born 5 December 1966 in Kongsvinger, Norway) is a Norwegian jazz musician (trumpet, flugelhorn and bukkehorn).

She left this big band to develop her own projects, and established in South Afrika (1999–2001).

She was instructor and artist at The Groove Valley JazzCamp in Beiarn 2007, and released her debut album as a solo artist with the Hildring (2009), focusing on the traditional instrument Bukkehorn instrument.

Here she plays with musicians like Helge A. Nordbakken (percussion), Nils-Olav Johansen (guitar/vocal), Paolo Vinaccia (percussion), Eirik-André Rydningen (drums), Karl Oluf Wennerberg (drums), Stein Austrud (vocoder), Majken Christiansen (vocal), Tuva Syvertsen (hardingfele/vocal), Mohdi Ahsan Papu (Pakistani flautes), Tore Brunborg (saxophone), Erlend Gjertsen (keyboards, percussion, world stick), Herman Rundberg (guitar/keyboards/percussion/vocals/world stick) and Svein Schultz (bass/keyboards/world stick).

[2] The follow-up, Stillness (2011), received critical acclaim and here she works alternately with Mats Eilertsen (bass), Thomas Strønen (drums) and the pianists Torbjørn Dyrud and Eyolf Dale.