Mahim is the name of a railway station on the Mumbai suburban railway on the Western Railway railway line. It is a suburb of Mumbai.

The Mahim fort which was once visible from the Mahim Causeway and Bandra Reclamation, is barely visible now. The Mahim Fort is a part of the larger "Bombay Castle" or St. George's Castle. This castle was an important base during the time of the British Empire, but now all that remains are a few ramparts scattered about the city - Sion, Worli, Sewri and Mazgaon. The fort was built by in 1969, by the former Governor of Bombay, Gerald Aungier.

Thomas Grantham then strengthened the fort's ramparts in 1684. In the year 1772, 111 years after Bombay was taken from them, the Portuguese attempted to attack this fort. The British replied fiercely with canon balls. In fact, the Bandra church also bore the brunt of their fire. There were about 100 soldiers and 30 cannons in the Mahim Fort at that time.

Today the fort is almost ruined and encroachers and hutments occupy it.

Mahim was one of the seven islands that originally made up Mumbai. Mahim, or Mahikawati as it was known, was the capital of Raja Bhimdev, who reigned over the region in the 13th century. He built a palace and a court of justice in Prabhadevi, as well as the first Babulnath temple.

In 1343, this island was possessed by the Mohammedans of Gujarat. It was in their reign that the old Mahim mosque was built. A dargah of Makhtum Fakir Ali Paru was built here in 1431.

In 1543, the Portuguese captured the islands of Mumbai. In 1662, these islands were given to the English King, Charles the II, as a part of the wedding dowry for the Portuguese princess, Catherine of Braganza. After British acquired Mumbai, they built the Mahim Fort here in order to protect themselves from the Portuguese. The fort today stands in ruins.

The Causeway connecting Mahim and Bandra (corrupted from "Bunder" meaning port) was completed in 1845 at a total cost of Rs.1,57,000 donated entirely by Lady Avabai Jamsetjee Jeejeebhoy, wife of the first baronet Sir Jamsetjee Jeejeebhoy with a stipulation that no toll would be charged to citizens for its use by the government.

In 1847, a small group of Scottish missionaries decided to start a new school, now one of the most high profile schools in Mumbai - the Bombay Scottish School.

Mahim is close to Dadar, which is a focal point for trains - i.e., it is accessible by the Western and Central lines as well as out-station trains. Mahim itself is accessible by Harbour and Western lines. So, all of Mumbai becomes accessible through Mahim and Dadar.

Mahim also has a good network of BEST Buses plying in and out. Please see the table below.