{{Infobox river | name = Usva | image = Usva.jpg | image_size = | image_alt = | image_caption = | map = Kama basin.png | map_size = 200 | map_alt = | map_caption = Scheme of the Kama River Basin. | source1_location = Middle Ural | mouth = Chusovaya | progression = {{RChusovaya}} | length = {{convert|266|km|mi|abbr=on}} | source1_elevation = | mouth_coordinates = {{coord|58|17|30|N|57|46|34|E|source:kolossus-ruwiki|display=it}} | discharge1_avg = {{convert|30.8|m3/s|cuft/s|abbr=on}} | basin_size = {{convert|6,170|km2|sqmi|abbr=on}} | tributaries_left = | tributaries_right = }}
The '''Usva''' ({{langx|ru|Усьва}}) is a river in Perm Krai in Russia, a right tributary of the Chusovaya (Kama basin). The river is {{convert|266|km|mi}} long, and its drainage basin covers {{convert|6170|km2|mi2}}.<ref name=gvr>[https://textual.ru/gvr/index.php?card=180803 «Река УСЬВА»], Russian State Water Registry</ref>
The Usva freezes up in the month of November and remains icebound until late April or early May. This is a lowland river for most of its course except upstream, where it has many rocks and rapids. Its banks are steep and rocky, covered with forests. The Usva crosses the Basegi range, which reaches {{convert|951|m|ft}} in elevation at ''North Baseg''. There are seven localities on the banks of the river and some abandoned villages. The town of Chusovoy is at the confluence of the Usva and the Chusovaya rivers.
'''Main tributaries:''' *Left: Vilva, Bolshaya Khariusnaya, Malaya Khariusnaya, Porozhnaya; *Right: Suriya, Berezovka, Persha, Tulumovka.
== Etymology == 240px|left|thumb|Vilva and Usva confluence The most believable explanation of the name is that it is a composite of the Komi-Permyak words ''usyny'' (to fall) and ''va'' (water); then it can be translated as "falling water".
== References == {{Reflist}} *Ресурсы поверхностных вод СССР. Гидрологическая изученность. Т. 2: Средний Урал и Приуралье. Вып. 1: Кама / под ред. В. В. Николаенко. Л.: Гидрометеоиздат, 1966. 324 с., С. 79
==External links== *[http://enc.permculture.ru/showObject.do?object=1803762859 Usva in encyclopedia of Perm Krai] *[https://bse.sci-lib.com/article114806.html Усьва (река в Пермской обл.)], Great Soviet Encyclopedia
Category:Rivers of Perm Krai