Lahijan is the capital city of Lahijan, the largest city in the eastern province of Gilan, and the ninety-fifth most populous city of Iran. The city is located in the mountainous area, and its slopes are covered with tea shrubs. Also, Lahijan is one of the cities of Gilak. The city is located in the east of Sefid-rud, at a height of 4 meters. In 2006, The city with 71, 871 inhabitants was the third most populous city in Gilan (after Rasht and Anzali), and now it is estimated that there will be around 250,000 people, including countryside countryside.
Lahijan is a region that is limited to the Caspian Sea from the north, from the east to Langarud, from the south to Deylaman, from the southwest to siahkal, and to the west to Astaneh-ye Ashrafiyeh. This city is built on a flat and plain land that is the result of sediments remaining from the rivers of Guilan. In terms of geographical location and historical features, it is considered one of the most important cities of Gilan, and has long been the center of Gilan’s Biah Pish.
The city of Lahijan has two central parts and 8 rural districts: Roodbaneh, Shirju Posht, Ahandan, Baz Kia Gurab, Lafmejan, Chushal, Layalestan and Lil. The city, based on the latest census in 2006, has a population of more than 162 898, about half of which is rural and the other half is urban.
The city of Lahijan has been dramatically reduced since the beginning of the 20th century due to the renewal of several divisions in Gilan. In the revision of 1937, Lahijan was a city which included all the eastern side of Sefid-rud in Gilan. In 1961 two towns named Langroud and Rudsar were created in this area. In 1962, Astaneh-ye Ashrafiyeh and Siahkal, who were formerly independent parts of Lahijan, became a city.
In summer, the Lahijan climate is warm and humid. In the winter, at first strong warm winds blow and then snow falls. The humidity is 76 to 79 percent and sometimes reaches 100 percent.
From 1960s and 1970s, authorities have been trying to improve the appearance of the city, which is considered to be the most attractive and touristy city in Gilan, so the eastern pool of the city which used for irrigation has been improved for recreational activities and walking. On holidays, many residents of the city and region go there. A cable car is connected to the summit of the mountain overlooking the city and provides panoramic views over the plain and the Caspian Sea. The establishment of the Islamic Azad University of Lahijan in 1988 has boosted the potential of the city.