Lahijan (Persian: لاهیجان) is a city in close proximity to the Caspian Sea within the Central District of Lahijan County, in northwestern Irans Gilan province. It serves as capital of both the county and the district.
Lahijan is distinguished by its blend of traditional and modern architectural styles. Situated on the northern slope of the Alborz Mountains, the city exhibits an Iranian-European urban structure. Its culture and favourable climatic conditions have positioned Lahijan as a significant tourist destination in northern Iran. The citys foundations are built upon sediments deposited by prominent rivers in Gilan, including the Sepid/Sefid-Rud (White River). Throughout history, Lahijan has been a prominent commercial centre and served as the capital of East Gilan under specific rulers. Over various historical periods, Lahijan has garnered recognition as a notable tourism hub within the Islamic world.