Kėdainiai is one of the oldest cities in Lithuania. It is located 51 km (32 mi) north of Kaunas on the banks of the Nevėžis River. First mentioned in the 1372 Livonian Chronicle of Hermann de Wartberge, its population as of 2020 was 23,667. Its old town dates to the 17th century.

The Nevėžis is the sixth longest river in Lithuania and one of the main tributaries of the Nemunas. The 209 km (130 mi) long Nevėžis flows entirely within Lithuania. Among the rivers that flow exclusively within Lithuania's borders, the Nevėžis is the second longest, after the Šventoji. Its source is in the Anykščiai District Municipality. The river first flows in a northwesterly direction, but at Panevėžys it turns southwest, and passing Kėdainiai, flows into the Neman just west of Kaunas near Raudondvaris.