Bošnjak (Serbian Cyrillic: Бошњак) is a common surname in Bosnia and Herzegovina, Croatia and Serbia. Etymologically, it is an archaic local demonym denoting people from the region of Bosnia as equivalent to the present-day English term "Bosnian". A closely related surname is Bošnjaković, which is a patronymic derivative of Bošnjak. The surname Bošnjak is carried by 6,731 people in Croatia according to the 2011 census,^[1] and as such ranks 28th by frequency. It is one of the most common surnames in three counties of Croatia.^[2] In Serbia the surname is carried by 2,042 people,^[3] and as such ranks 496th by frequency.

It may refer to:

• Armin Bošnjak (born 1994), Montenegrin footballer
• Branka Bošnjak (born 1956), Serbian architect and politician
• Branko Bošnjak (1923–1996), Croatian philosopher
• Branko Bošnjak (born 1955), Yugoslav footballer
• Bruno Bošnjak (born 1983), Croatian snowboarder
• Domagoj Bošnjak (born 1995), Croatian Basketball player
• Dragan Bošnjak (1956-2019), Serbian footballer
• Dražen Bošnjak, American composer
• Ernest Bošnjak (1876-1963), Yugoslavian cameraman, film director and printer
• Ivan Bošnjak (born 1974), Serbian politician
• Ivan Bošnjak (born 1979), Croatian footballer
• Ivan Bošnjak (born 1982), Serbian basketball player
• Jim Bosnjak, Croatian-Australian businessman and chairman of Westbus, Australia's largest privately owned bus operator
• Marko Bošnjak (born 2004), Bosnian-Herzegovinian pop singer
• Matea Bošnjak (born 1997), Croatian footballer
• Petar Bošnjak (born 1974), Croatian footballer
• Predrag Bošnjak (born 1985), Hungarian footballer of Serbian descent
• Spomenko Bošnjak (born 1973), Bosnian Croat footballer
• Strahinja Bošnjak (born 1999), Serbian footballer

• Boshnak, surname
• Bošnjaković, surname
• Bosanac (surname)