Sweltzer River
{{Infobox river
| name = Sweltzer River
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| image = AndrewEnns in DSC00765.JPG
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| map =
| map_size = 265
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| pushpin_map = Canada British Columbia
| pushpin_map_size = 265
| pushpin_map_caption= Location of the mouth of the Sweltzer River in British Columbia
| subdivision_type1 = Country
| subdivision_name1 = Canada
| subdivision_type2 = Province
| subdivision_name2 = British Columbia
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| source1 = Cultus Lake
| source1_location = Cascade Mountains
| source1_coordinates= {{coord|49|04|33|N|121|58|53|W|display=inline}}
| source1_elevation = {{convert|151|ft|abbr=on}}Source elevation derived from Google Earth search using GNIS source coordinates.
| mouth = Chilliwack River
| mouth_location =
| mouth_coordinates = {{coord|49|05|49|N|121|57|50|W|display=inline,title}}
| mouth_elevation = {{convert|110|ft|abbr=on}}Mouth elevation derived from Google Earth search using GNIS source coordinates.
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The Sweltzer River is a river in British Columbia, Canada, that drains the waters of Cultus Lake into the Chilliwack River.{{cite bcgnis|16658|Sweltzer River}} It is about {{convert|3|km|mi|0}} long, and much of it runs through Soowahlie Indian Reserve No. 14, which is under the administration of the Soowahlie Indian Band.
The name Sweltzer River was applied on an 1895 map to Liumchen Creek, which is to the northeast.