- Karaj is a city in Iran, located in the Alborz Province. It is the capital of Alborz Province and is situated about 20 kilometers west of Tehran, the country's capital. With a population of over 1.6 million people, Karaj is one of the largest cities in Iran. The city has a rich historical background, with archeological evidence indicating human settlements in the area dating back to at least 4000 BC. Karaj is known for its agricultural products, including fruits, vegetables, and flowers. It also has a thriving industrial sector, with numerous factories and industrial zones. Additionally, the city is a popular destination for tourists, with attractions such as the Karaj Dam and the Pardisan Park.