The '''Tuma River''' is a river located in [[Nicaragua]]. The length of the Tuma is {{convert|180|km|mi}}.<ref name="defensa"/>
The river, a left [[tributary]] of the [[Río Grande de Matagalpa]],<ref>{{cite bookEB1911|authorwstitle=HughChisholmNicaragua |titlevolume=Theencyclopædia19 britannica:| apages dictionary= of642–645; arts,see sciences,page literature and643 general information|urlquote=https://archive.org/details/encyclopdiabrit05chisgoog|accessdate=23February2011|year=1911|publisher=AtThe Rio Grande or Amaltara, which receives one large tributary, the UniversityTuma, press|pages=[https://archiveis navigable for about 100 m.org/details/encyclopdiabrit05chisgoog/page/n656643]–}}</ref> is located in the [[Jinotega Department|Jinotega]] and [[Matagalpa Department]]s, [[North Caribbean Coast Autonomous Region]], and [[South Caribbean Coast Autonomous Region]]. The source of the Tuma River is located in Jinotega Department, about 250 kilometers northeast of the capital, [[Managua]]. The river flows in the eastern direction, crosses into Matagalpa Department, in the lower course forms the border between Matagalpa Department and the North Caribbean Coast Autonomous Region, and between the North Caribbean Coast Autonomous Region and the South Caribbean Coast Autonomous Region where it joins Río Grande de Matagalpa.
The biggest towns on the banks of the Tuma are [[Tuma-La Dalia|El Tuma]] in Matagalpa Department and [[Mulukuku]] in the North Caribbean Coast Autonomous Region.
