Suslonger (Russian: Сусло́нгер; Meadow Mari: Сӱзлэҥер, Süzleŋer) is an urban locality (an urban-type settlement) in Zvenigovsky District of the Mari El Republic, Russia.

As of the 2010 Census, its population was 3,161.

[2] Urban-type settlement status was granted to it in 1942.

[citation needed] Within the framework of administrative divisions, the urban-type settlement of Suslonger, together with one rural locality (the settlement of Mochalishche), is incorporated within Zvenigovsky District as Suslonger Urban-Type Settlement[9] (an administrative division of the district).

[1] As a municipal division, Suslonger Urban-Type Settlement is incorporated within Zvenigovsky Municipal District as Suslonger Urban Settlement.