Colaba (Marathi: कुलाबा, pronounced [kola ː ba ː]) is part of the city of Mumbai, India, and it is also the Lok Sabha constituency. During the Portuguese rule in the 16th century, the island was known Candil. When the British took the island in the late 17th century, it came to be known as Colio.

The name comes from Colaba Kolabhat, a word in the Kolis language, which is the native people of the island before the arrival of the Portuguese. The area now Colaba was originally an area that consists of two islands: Colaba and Little Colaba. The island of Colaba was one of the seven islands of Bombay held by the Portuguese.

Gateway of India, the Art Deco style Regal Theatre, the coffee bars (Mondego, Royal and Leopold), and the Taj Mahal Palace & Tower Hotel, all add to the atmosphere. On the southern tip located on a military cantonment is a large Navy Nagar layout built on the former reclaimed land. Older parts of the cantonment maintains a large, wooded area other than this there is little green left in this area which is otherwise occupied. Navy Nagar is situated at the center of the Tata Institute of fundamental research (TIFR), one of the leading research institutions in India. Colaba is known for high-end boutiques, imitation consumer goods, and is popular with tourists.

This is the place where the rich Indian industrialists and business moguls like Ratan Tata and Ambanis stay. Not only that, Colaba Causeway and Causeway as it is known in Mumbai is the best place to buy everything from bracelets to watches, clocks and clothing to perfumes, DVDs and CDs. There is an Old English charm and a modern feel as well to colaba. Colaba is the Center of the Arts in Mumbai, all major galleries and museums are located in and around this area.

On the 26th November 2008, terrorist attacks occurred in various places in Colaba, in particular, the Taj Mahal Palace & Tower, Cafe Leopold Mumbai and the Chabad House. The attacks caused over 100 deaths and significant damage.