Ryńsk [rɨɲsk] is a village in the administrative district of Gmina Wąbrzeźno, within Wąbrzeźno County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 10 kilometres (6 mi) south-west of Wąbrzeźno and 27 km (17 mi) north-east of Toruń.

In 1655, it was the site of the Treaty of Rinsk, a short-lived inner-Prussian alliance during the Second Northern War.