Ngao River
{{Infobox river
| name = Ngao River
| native_name ={{native name|th|แม่น้ำงาว}}
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| image = Ngao town-ngao river1793.JPG
| image_size =
| image_caption = Ngao River in Ngao town
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| subdivision_type1 = Country
| subdivision_name1 = Thailand
| subdivision_type2 = State
| subdivision_name2 = Phayao Province, Lampang Province, Phrae Province
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| subdivision_type5 = City
| subdivision_name5 = Ngao town
| length_km = 98
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| source1 =
| source1_location = Phi Pan Nam Range, Phayao Province
| source1_coordinates=
| source1_elevation = {{convert|1267|m|abbr=on}}
| mouth = Yom River
| mouth_location = Kaeng Suea Ten area, Song District, Phrae Province
| mouth_coordinates = {{coord|18|35|54|N|100|8|53|E|display=inline,title}}
| mouth_elevation = {{convert|195|m|abbr=on}}
| progression =
| river_system =
| basin_size_km2 = 1800
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The Ngao River ({{langx|th|แม่น้ำงาว}}, {{RTGS|Maenam Ngao}}, {{IPA|th|mɛ̂ː.náːm ŋāːw|pron}}; {{langx|nod|น้ำแม่งาว}}, {{IPA|nod|náːm mɛ̂ː.ŋāːw|pron}}) is a river of Thailand with its source in the Phi Pan Nam Range. It is a tributary of the Yom River, part of the Chao Phraya River basin.[http://flood.dpri.kyoto-u.ac.jp/ihp_rsc/riverCatalogue/Vol_03/09_Thailand-4.pdf Mae Nam Yom]
The Ngao in this basin should not be confused with the Ngao River that is a tributary of the Yuam River (แม่น้ำยวม), part of the Salween basin, located to the west.{{Cite web |url=http://www.chiangmai-chiangrai.com/national_parks-mae_ngao.html |title=Mae Ngao National Park |access-date=2012-05-05 |archive-url=https://web.archive.org/web/20120406074034/http://www.chiangmai-chiangrai.com/national_parks-mae_ngao.html |archive-date=2012-04-06 |url-status=dead }}