{{Infobox river | name = Zagyva | image = Zagyva2.jpg | image_caption = The Zagyva near Szolnok | map = Zagyva.png | source1 = Nógrád County | source1_elevation = | mouth_location = Tisza in Szolnok | mouth_coordinates = {{coord|47.1724|20.2023|display=inline,title}} | progression = {{RTisza}} | subdivision_type1 = Country | subdivision_name1 = Hungary | length = {{convert|179|km|abbr=on}} | tributaries_left = | tributaries_right = Galga | basin_size = {{convert|5677|km2|abbr=on}} | discharge1_avg = {{convert|9|m3/s|abbr=on}} }} thumb|left|250px|The Zagyva meets the Tisza River in Szolnok. The '''Zagyva''' is a river in Hungary. This 179 km long river drains a basin of 5,677 km<sup>2</sup>. The source is near Salgótarján in Nógrád county. It flows through the towns of Bátonyterenye, Pásztó, Hatvan and Jászberény and flows into the Tisza at Szolnok. Average discharge at Szolnok is 9 m<sup>3</sup>/s. The Zagyva is the longest river in Hungary that has both its source and its confluence within the country's borders.
==Etymology== The name comes from Slavic ''sadjati'': to settle (sediments). ''*Sadzava'': a river that carries many sediments, see i.e. Czech Sázava.<ref name="varsik">{{cite book |last=Varsik |first=Branislav |title=Slovanské (slovenské) názvy riek na Slovensku a ich prevzatie Maďarmi v 10.-12. storočí|location=Bratislava|page=82|publisher=Slovenská akadémia vied |year=1990 |language=Slovak| ISBN=80-224-0163-3}}</ref>
In Hungarian, the name means 'muddled' (''zagyvál(ni)'': 'to muddle').<ref>{{Citation |title=zagyvál |date=2021-10-28 |url=https://en.wiktionary.org/w/index.php?title=zagyv%C3%A1l&oldid=64460696 |work=Wiktionary |language=en |access-date=2022-09-22}}</ref>
==Tributaries==
The following rivers are tributaries to the river Zagyva (from source to mouth):
*Left: Iványi, Mindszenti, Galya, Lengyendi, Kecskés *Right: Galga
==References== {{Reflist}}
{{Commons category|Zagyva}}
Category:Rivers of Nógrád County
{{Hungary-river-stub}}