Bandar-e Anzali in the context of Central District (Bandar-e Anzali County)

Gilan Province (Persian: استان گیلان) is one of the 31 provinces of Iran, in the northwest of the country and southwest of the Caspian Sea. Its capital is the city of Rasht. The province lies along the Caspian Sea, in Iran's Region 3, west of the province of Mazandaran, east of the province of Ardabil, and north of the provinces of Zanjan and Qazvin. It borders Azerbaijan (Astara District) in the north.

The northern section of the province is part of the territory of South (Iranian) Talysh. At the center of the province is Rasht. Other cities include Astaneh-ye Ashrafiyeh, Astara, Fuman, Hashtpar, Lahijan, Langarud, Masuleh, Manjil, Rudbar, Rudsar, Shaft, Siahkal, and Sowme'eh Sara. The main port is Bandar-e Anzali, formerly known as Bandar-e Pahlavi.

Iran has a long paved road system linking most of its towns and all of its cities.

Trains operate on 11,106 km (6,942 mi) of railroad track. The country's major port of entry is Bandar-Abbas on the Strait of Hormuz. After arriving in Iran, imported goods are distributed throughout the country by trucks and freight trains. The Tehran–Bandar-Abbas railroad, opened in 1995, connects Bandar-Abbas to the railroad system of Central Asia via Tehran and Mashhad. Other major ports include Bandar e-Anzali and Bandar e-Torkeman on the Caspian Sea and Khorramshahr and Bandar-e Emam Khomeyni on the Persian Gulf.