Tistedalen is a part of Halden, Norway. Originally four kilometers from the town centre, the area, from the start growing up around a saw mill, has now been engulfed by Halden itself, although it still maintains some identity.
The name Tistedal comes from the river "Tista" and "dal" meaning the valley. It is also called Tistdærn by the locals.
Tistedalen is a classic working class community, surrounded by small factories. There is some presence of different religious groups.
In 1991 and 1992 Tistedalen had four brutal murders. Tistedalen suddenly got into the focus of the media, due to one of the worst murdercases in norwegian history. In 1994, a local man was sentenced for the "Tistedalsdrapene". Tistedalsdrapene meaning "The killings in Tistedal".