BSW may refer to:

• Bachelor of Social Work, an academic qualification at some institutions
• Bally Sports West, American regional sports network owned and operated by Bally Sports
• Batesville Southwestern Railroad
• Bethesda Softworks, a video game publisher
• Birmingham Snow Hill railway station, Birmingham, England (National Rail station code: BSW)
• Black Sidewall is a characteristic of a tire used in the reference code.
• Blind Spot Warning, an auto-safety capability
• Boswell Bay Airport (IATA: BSW)
• BrettspielWelt, an online boardgame portal
• British School of Washington, a DC area private school specializing in British and international curriculum
• British Standard Whitworth, an imperial-unit based screw-thread standard
• BSW (basketball club), a Dutch professional basketball team
• Bündnis Sahra Wagenknecht, a German political party
• Byelorussian Steel Works