Pyvesa
{{short description|River in Lithuania}}
{{Expand Lithuanian|topic=geo|date=October 2011|Pyvesa}}
{{Infobox river
| name =Pyvesa
| image =Pyvesa001.JPG
| image_size =
| image_alt =
| image_caption =
| map =
| map_size =
| map_alt =
| map_caption =
| source1_location =
| mouth = Mūša
| mouth_coordinates = {{coord|56.0983|24.4396|display=it|region:LT_type:river}}
| progression = {{RMūša}}
| subdivision_type1 = Countries
| subdivision_name1 = Lithuania
| subdivision_type2 = Region
| subdivision_name2 = Biržai district municipality, Panevėžys County
| length_km = 92.6
| source1_elevation =
| mouth_elevation =
| discharge1_avg =
| basin_size_km2 = 501.6
| river_system =
| tributaries_left =
| tributaries_right =
}}
Pyvesa is a river of Biržai district municipality, Panevėžys County, northern Lithuania. It flows for {{convert|92.6|km}} and has a basin area of {{convert|501.6|km2|abbr=on}}.
It is a right tributary of the Mūša.[http://gamta.lt/files/LR_upiu_klasifikatorius.pdf LIETUVOS RESPUBLIKOS UPIŲ IR TVENKINIŲ KLASIFIKATORIUS (Republic of Lithuania- River and Pond Classifications)]. Ministry of Environment (Lithuania). Accessed 2011-11-17.