In the era of Nader Shah Afshar, groups from the Kurds of Quchan and areas of northern Khorassan also settled there.

Rudbar was near the epicenter of the 1990 Manjil–Rudbar earthquake of magnitude 7.3 on the Richter scale (MS=7.7, MW=7.3, mb=6.4) at 12:31am local time on June 21, 1990, that killed around 50,000 and injured 100,000 city residents.

There are several dialects and ethnicities in Gilan who have either their own language from South Caspies or slight variations to the way they speak.

[10] It is located on the fringes of a valley through which the Sepid River (Sepidrood in Persian, Esparoo in Rudbari language) flows, and has a variable climate.

Despite the olive gardens that may suggest presence of a Mediterranean climate, the winters are very cold in the area.