You can help expand this article with text translated from the corresponding article in Swedish. (March 2022) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Swedish Wikipedia article at [[:sv:Ljusnan]]; see its history for attribution. You may also add the template {{Translated|sv|Ljusnan}} to the talk page. For more guidance, see Wikipedia:Translation.

Ljusnan
Ljusnan seen from the small town of Färila
Location
Country	Sweden
Physical characteristics
Mouth	Bothnian Sea
• coordinates	61°12′12″N 17°07′57″E / 61.20333°N 17.13250°E / 61.20333; 17.13250
• elevation	0 m (0 ft)
Length	430 km (270 mi)[1]
Basin size	19,828.1 km2 (7,655.7 sq mi)[2]
Discharge
• average	230 m3/s (8,100 cu ft/s)[1]
• maximum	2,500 m3/s (88,000 cu ft/s)[1]

Ljusnan (from Old Norse: Lusn — light^[3]) is a river in Sweden, which is 440 kilometers long. The river starts in northwestern Härjedalen and then continues throughout the province into Hälsingland all the way to the Bothnian Sea. The biggest tributary is Voxnan. The river is heavily used for hydropower with 18 hydro powerplants. During 2001 Ljusnan produced 4,5 TWh.^{[citation needed]}