Bhayandar West is the western half of Bhayandar, the northernmost railway suburb on Mumbai's Western Line, sitting where Salsette Island meets the Vasai Creek. It falls under the Mira-Bhayandar Municipal Corporation and lies within Thane district, even though it functions as part of Mumbai's suburban rail network.

The neighbourhood has traditionally been residential, unlike Bhayandar East across the tracks, which grew around steel-utensil manufacturing. Bhayandar railway station sits between Mira Road and Naigaon on the Western Line, giving local-train access south toward Borivali, Andheri and Churchgate, and north toward Vasai Road and Virar.