Dadar is a place in Mumbai, and is also a railway station on both the Western (Dadar) and Central lines (Dadar T.T.) of the Mumbai Suburban Railway network. Dadar is situated in the heart of Mumbai, and Dadar station is the only railway station common to both the Central and Western lines. This makes the station a transit point for thousands of passengers using the Mumbai Suburban Railway and one of the most crowded railway stations on the network.

Dadar has long been a cultural center, not only for Maharashtrians and the Marathi speaking population, but for the entire Indian diaspora.

Dadar is divided into East and West by the railway line. Dadar East is popularly called Dadar Central or Dadar T.T. because the former Dadar Tram Terminus (which was closed with the closure of the tram network in Mumbai) is located here. Dadar West is sometimes referred to as Dadar B.B. because it lies along the western line, which was once part of the Bombay & Baroda & Central India (BB&CI) Railway. Dadar West market is a very popular shopping destination for residents of central Mumbai, the suburbs, and distant satellite towns.