Lavasanat District (Persian: بخش لواسانات) is in Shemiranat County, Tehran province, Iran.

[3] During the Qajar era and early 20th century Lavasanat was the transit way between northern slopes of Elburz and Tehran with Great Lavasan (Lavasan Bozorg), Ammameh, Afjeh and Najarkala known as the most famous towns of Lavasanat.

[citation needed] The natives of the Lavasanat District are of Caspian origin.

[4] The local dialect, or vernacular, spoken by its natives is a mix of Persian and Caspian.

[4] In the village of Ira (as well as Veskara), this vernacular approaches Mazandarani.