Sundern is situated approximately 10 km (6 mi) south-west ofArnsberg. Around Sundern extends the nature parkHomert which attracts tourists, many from theNetherlands. Winter tourism is also substantial, primarily in the municipalityWildewiese with its skiing area. TheSorpesee, an artificial lake, is used by watersportsmen, campers andfishermen.
The main industries of Sundern are several domestic and industrial lighting companies, household appliances and packaging businesses.SEVERIN Elektrogeräte GmbH has its headquarters in Sundern.